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Wednesday, 18 February 2026

What does 'progress' look like in your astrophotography post editing skills - 2?

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Over the last three and a half years I have been on a slow 'post editing' learning journey which can be summarised thus: 

DEEPSKYSTACKER - AFFINITY PHOTO - SIRIL vs1.2.4 - SIRIL vs 1.4 

....and anyone who has regularly followed my posts since the start of this blog will know that I have been trying to map out progression ladders in skills, knowledge and understanding relating to

·       using astrophotography equipment,

·       acquiring high quality astrophotography data,

·       and in post-editing skills using a variety of free download astrophotography programs.



I have already done some ‘initial’ thinking about some of the above and you can read these posts here:

https://undersouthwestskies.blogspot.com/2026/02/what-does-progress-look-like-in-your.html 

https://undersouthwestskies.blogspot.com/2026/01/can-we-turn-our-astrophotography.html - progress ladders for capturing astrophotography data and using astrophotography equipment 

https://undersouthwestskies.blogspot.com/2026/01/discussion-is-astrophotography-hard.html 


I’m focusing on this work because I find such ‘progression ladders’ really useful in mapping out what progress I have made in astrophotography, and what further steps I can take to improve further. 


In today’s post I start to explore:

·       What might a structured four‑level progression ladder for learning post‑processing astrophotography skills, using SIRIL v1.4, look like?

The resources below are designed to guide ‘beginner’ and ‘advanced beginner’ astrophotographers through a structured progression of post‑processing skills using Siril v1.4, Siril scripts, Python automation, and enhancement tools such as the Integrated Cosmic Clarity Suite and the Veralux Suite.

I have based it on data captured with lenses such as the Samyang 135mm and/or small refractors like the Zenithstar 61II, both paired with either a DSLR or a dedicated astro‑camera, and using something like a skywatcher star tracker or a mount such as the EQM-35-PRO or equivalent

Before we dive into the levels, I think the photographs below exemplify my journey and where I am now on it. Details underneath each one. 



My first image of M45 taken in 2022 with my unmodded Canon 800D and Canon 70 - 200mm kit lens on a SWSA 2i. Stacked in Deepskystacker and edited in Affinity Photo

Later in early 2023 - same camera but this time a Samyang 135 mm F/2.8 lens with the same tracker. Again, using the same photo processing software - Deepskystacker and Affinity Photo

Jump to late 2024 - same equipment as above - but a better understanding of Deepskystacker and Affinity Photo 

Early 2025 and the image above and below neatly illustrate my see-saw progress in data acquisition and post editing processing. Same equipment, same editing software. The image above involved taking calibration frames. The one below - I forgot to do those. 





Now the image abnove and the two below - are new editing of that same data collected in early 2025. However this time I used SIRIL 1.4 to restack the original data and then used my latest SIRIL workflow which I shared in a previous post (Link to it at the top of this post) 

Qualitative differences are beginning to appear - better colour, less noise, improved definition and texture. 



So, with the above photos in mind, lets jump straight into the main subject material for this post: 

Progression Ladder Overview

I have gone for Four Levels of Mastery – briefly described in level descriptors

BeginnerFoundations & first stacks - We learn the basics of calibration, stacking, and simple enhancement. Most of our work uses automated Siril scripts and preset tools.

IntermediateControlled processing & selective enhancements - We begin to take manual control: manual stacking, gradient removal, star masks, and parameter tuning in Cosmic Clarity and Veralux.

AdvancedCustom pipelines & data‑driven processing - We build our own Siril scripts, integrate external tools, and use Python to automate parts of our workflow.

ExpertFull automation, multi‑night integration & HDR workflows - We create multi‑night automated pipelines, use advanced colour and PSF modelling, and produce reproducible, observatory‑grade workflows.

Each level proposed hopefully builds on the last, thus ensuring a smooth, confidence‑building journey from first stacks to fully automated pipelines.

Diagrammatically it looks like this: 


NOTES:

Learning NEVER progresses in a straight linear fashion

Thus, it is perfectly acceptable to find yourself getting to grips with different skills in different levels at the same time. It’s a guide, that’s all; not a rigid template. And, I think this is reflected in the photos I used at the top of this post - I drew from both level one and two to post edit the last three photos in the sequence. 

As astrophotography beginners - we are mainly interested in levels 1 and 2 for the moment, and this is what you will find below. 

I am only a modest beginner myself, so my interpretation of what levels three and four might look like, are based on very little understanding or experience of some of the knowledge and skills I have outlined in them.

Consequently, I will add levels three and four at a later date when I have mastered most of the level two intermediate stuff. To try and work out what level three and four would look like based on my existing knowledge – well it would be merely ‘guess work’ on my part – and ethically, for me, just won’t do!

When I eventually master level two intermediate stuff, I will come back and have a better stab at defining levels three and four.  On my current time/progress continuum, that could be towards the end of next year, 2027. 


So, with the above caveats in place, let’s jump in then and explore each of the first two proposed levels in a little more detail.

As you go, why not tick off the skills you have mastered so far on your personal learning journey and/or put them against my photographs above and see if you can work out which criteria I may have achieved during their editing. 


🌌 Progression Ladder for Astrophotography Post‑Editing

Using Siril v1.4, Siril Scripts, Python Automation, Cosmic Clarity Suite & Veralux Tools

 

1. Beginner — “Foundations & First Stacks”

Core Goal: Produce our first clean, calibrated image using mostly automated tools. Become comfortable with the Siril interface, file organisation, basic preprocessing, and simple scripts.

Knowledge

  • Understand what calibration and light frames are and why they matter:
    • Lights, Darks, Flats, Bias/offsets
    • How they relate to DSLR vs astro‑cam workflows
  • Basic understanding of:
    • Linear and non-linear data
    • Light pollution gradients
    • Sensor noise
    • Bayer patterns (for DSLR RAWs)
  • File and folder management basics before entering SIRIL:
    • FITS vs RAW
    • Organising sessions by target/date
    • Copying data from camera/stacking device
    • Creating correct folder structures
      • /lights/
      • /darks/
      • /flats/
      • /bias/

Siril v1.4 Skills

A.     Siril Interface Basics

  • Opening Siril
  • Understanding the workspace
  • Navigating tabs:
    • Image Processing
    • Tools
    • Scripts
    • Python Scripts
  • Setting working directory
  • Viewing images (zoom, stretch, histogram auto‑stretch)
  • Run the One‑Shot Color Preprocessing Script (OSC_Preprocessing.ssf)
  • Load and inspect individual subs using the Sequence tab

B.     Image Processing Tab — Beginner Tools

These are the simplest, safest tools for new users:

Image Processing Tab

  • Histogram stretch - using the Asinh, Histogram and Curves Transformation tools; and also, the Generalised Hyperbolic Stretch Transformation
  • Auto-stretch preview
  • Basic cropping
  • Background extraction OR Scripts – python scripts – processing – AutoBGE.py
  • Colour calibration - basic - Photometric, SPCC, colour calibration
  • Star detection preview

C.    Scripts Tab — Beginner Scripts

  • OSC_Preprocessing.ssf
  • OSC_Preprocessing_NoFlat.ssf
  • OSC_Preprocessing_NoBias.ssf
  • Mono_Preprocessing.ssf
  • Mono_Preprocessing_NoFlat.ssf

These teach the user how Siril automates calibration, registration, and stacking.

 Python Scripts Tab — Beginner

  • Running some basic pre‑installed Python scripts e.g. Cosmic Clarity Denoise and Sharpen …. And Veralux Nox, Hypermetric Stretch, Alchemy and Silentium
  • Apply beginner‑friendly presets on the above without parameter tuning
  • Understanding script output
  • Viewing logs

A.     Saving & Exporting

  • Saving FITS
  • Exporting JPEG/PNG/TIFF
  • Understanding linear vs non-linear data

Below is a practical, observable checklist.
If you can confidently tick 80–90% of a level, you’re ready to move up to the next level

 

Beginner → Intermediate Readiness Checklist

You’re ready to move up if you can:

  • [ ] Capture and organise lights, darks, flats, and bias/offset frames
  • [ ] Run Siril’s OSC preprocessing script without errors
  • [ ] Understand linear vs non‑linear data
  • [ ] Perform basic background extraction
  • [ ] Apply photometric or auto colour calibration
  • [ ] Stretch an image using histogram + Asinh tools
  • [ ] Use Cosmic Clarity or Veralux presets without needing guidance
  • [ ] Export a clean, basic final image (TIFF/PNG)

If most of these are solid, you’re ready for controlled manual processing.




The California Nebula (above) and Ghost of Cassiopeia (below) taken in 2025



2. Intermediate — “Controlled Processing & Selective Enhancements”

Core Goal: Move from automated scripts to controlled, intentional processing. Gain control over preprocessing, stacking, gradient removal, colour work, and basic noise reduction.

Knowledge

  • Understand:
    • Signal‑to‑noise ratio (SNR) and how stacking improves it
    • Star colour vs nebula colour
    • Gradient sources (LP, moonlight, optics)
  • Learn the difference between:
    • Linear vs non‑linear data
    • Photometric vs manual colour calibration
    • Star masks vs object masks

Siril v1.4 Skills

A.      Use manual preprocessing:

    • Cosmetic correction
    • Manual registration
    • Manual stacking with rejection algorithms (Winsorized Sigma, Linear Fit Clipping)

A.      On Image Processing Tab, complete:

  • Manual histogram manipulation
  • Manual background extraction (multi-point)
  • Gradient removal
  • Photometric colour calibration
  • Star colour calibration
  • Green noise removal (SCNR‑style)
  • Deconvolution (basic)
  • Noise reduction (basic)
  • Cosmetic correction
  • Star mask creation
  • Star removal using Starnet
  • PSF tool (basic use)

A.      Scripts Tab — Intermediate Scripts - Cosmic Clarity Suite / Veralux Tools

Learn to adjust parameters rather than relying on presets

  • Cosmic Clarity Basic Scripts
    • CC_Preprocessing.ssf
    • CC_GradientRemoval.ssf
    • CC_ColourCalibration.ssf
  • Veralux Basic Scripts
    • Veralux_Preprocessing.ssf
    • Veralux_Colour.ssf
    • Veralux Chromatic Noise Suppression
    • Veralux Star Tightening
    • Veralux Revela
    • Veralux Curves 

A.      Python Scripts Tab — Intermediate – begin using Siril’s scripting console

  • Running community scripts
  • Editing simple parameters
  • Understanding script structure

A.      Obtaining Scripts

  • Downloading scripts from:
    • Siril website
    • GitHub repositories
    • Cosmic Clarity suite
    • Veralux suite
  • Installing scripts into:
    • ~/.config/siril/scripts/
    • Siril scripts folder (Windows/macOS/Linux)
  • Verifying script installation
  • Updating scripts

A.      Saving & Exporting

  • Exporting 16‑bit TIFF for Photoshop/PixInsight
  • Exporting stretched vs unstretched versions
  • Saving project files

 Intermediate → Advanced Readiness Checklist

You’re ready to move up if you can:

  • [ ] Perform manual calibration, registration, and stacking
  • [ ] Choose appropriate rejection algorithms (e.g., Winsorized Sigma)
  • [ ] Use advanced background extraction with multiple sample points
  • [ ] Create and use star masks
  • [ ] Perform star reduction and colour calibration intentionally
  • [ ] Edit Siril scripts (e.g., change debayering, stacking parameters)
  • [ ] Use Veralux and Cosmic Clarity tools with manual parameter tuning
  • [ ] Run simple Python utilities (renaming, script generation, batch sorting)

If you’re comfortable building a repeatable workflow, you’re ready for custom pipelines.


If you are a beginner to astrophotography, I hope you can recognise yourself somewhere in these two levels; and more importantly, can find some ‘progress steps’ to work on.

As promised, towards the end of this year I will attempt to define the last two levels as well. 

I cannot guarantee in any way that I have got any of this right, so, as always, I welcome any constructive discussion, tips, advice, comments. Drop me a message in the comment box at the end of the post.

What do you think:

·       I’ve got right?

·       Got wrong?

·       Missed out?

·       Put in the wrong level?

·       Misinterpreted?

·       Been over or under ambitious on?  



Friday, 6 February 2026

What does 'progress' look like in your astrophotography post editing skills?

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What does progress in post editing skills look like? 

In this brief post I share with you some images I have been working on whilst I have been ill and laid up. I am using SIRIL v1.4 with the Veralux Suite of python scripts. 

You can find details about my post editing workflow using SIRIL in this post: 


and it might be worth you popping across to read this blog post first. 

So here are four images of roughly the same area of our celestial neighbourhood - around the Orion Nebula M42 and also the Horsehead and Flame nebulae. 

All were taken using the following equipment: 

  • Canon 800D (astro-modded in 2025)
  • Samyang 135mm F/2.8
  • August 2023 - skywatcher star adventurer 2i wifi tracker on Benbro carbon fibre tracker
  • August 2025 - EQM-35-PRO mount and also using autoguding system comprising ASIair Mini, ASIair 120mm mini guide cam and RVO 32mm F/4 Guide scope

My first image of  M42 taken from south of Spain using a 70 - 200mm canon kit lens
Post edited in Affinity Photo
Taken in winter 2023


Another one from south of Spain 
First outing for Samyang 135mm  winter 2024
Post editing again in Affinity Photo 
In this image, colour and structure definition is better - longer integration times helped during data collection

Winter 2024 
A sudden jump in understanding regarding using my tracker, and getting better integration times out in the field; also in the collection of calibration frames
Better colour, definition, sharpness, less noise
This one was edited in Siril - my first effort using that software andf then finished off in Affinity Photo

The image above and the two later ones below come from data collected during August 2025
This was also using the EQM-35-PRO mount and the guiding system as well. 
Longer subs, more calibration frames, improved guiding, longer integration times.
But, also improving understanding of how SIRIL works. 


Here in these two images you can see my progress in understanding SIRIL and also my improving use of the Veralux and Cosmic Clarity python scripts - particularly Veralux hypermetric stretch, curves, alchemy and vectra - to get that better definition, structure, texture, clarity and colour balance



So what are my next steps? 

  1. to continue using the Veralux suite and gaining more familiarity with the various applications and work flow order
  2. to take longer subs out in the field - increase the integration time 
  3. on targets like M42, to take a variety of different length subs - to capture all the details within a nebula. This will also require me to learn how to stack different data sets and then combine/blend them during post editing 

Wednesday, 4 February 2026

Practical decision trees for solving common astrophotography pain points for beginners

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Astrophotography ‘Experience Tiers’ with Integrated ‘Gear Ladders’

Learning astrophotography can feel a little like navigating the night sky without a star chart. You know there are incredible destinations out there - but it’s not always clear where you are, how far you’ve come, or which direction to head next.

 In a previous post, “Is Astrophotography Hard?”    (https://undersouthwestskies.blogspot.com/2026/01/discussion-is-astrophotography-hard.html ), I explored the common challenges beginners face when entering this exciting hobby and what the typical learning journey might look like, based on my own experiences.

In a following post, I tried to take that thinking a step further.

Is it possible to identify clear experience tiers in astrophotography—stages of learning that help beginners and intermediate astrophotographers understand where they are and what comes next?

I shared a  proposed tiered structure based on astrophotography knowledge and practical skills

https://undersouthwestskies.blogspot.com/2026/01/can-we-turn-our-astrophotography.html


In today's post I go one step further again. 

It is all well and good knowing what level I might be at on my astrophotography learning journey but, what happens when I get stuck somewhere along it? 

I call these times 'Pain Points' - the point where I get stuck on something and don't know how to get out of the situation/problem. Or when I am doing something wrong but can't quite work out what it is and how I successfully correct the issue. 

Practical Decision Trees might be one possible solution to 'pain points' 

Below are my two efforts - one for wide-field and one for Deep-sky astrophotography. And finally, a short Meta tree thast applies to any astrophotographer. 

See what you think. 

Are they useful? 

Can they help out in the field or when post editing? 

As always drop me a comment in the box below and clear skies, stay safe and have fun out there under the dark skies. 

Steve 





















Saturday, 24 January 2026

3 D printed bits useful for astrophotography

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Having a wonderful son-in-law who also owns a posh 3D printer is one of those life's little joys.  He is a clever, practical guy, who can turn his hands and brain to many of those DIY tasks from putting up shelving to constructing alcove cupboards. He also happens to be an electrics and IT tech wizard as well.  The family 'skills' pool rose significantly when he joined the clan. 

To date, using free download plans, he has printed me the following: 

  • three tripod clips to hold power banks
  • two vixen dovetail style clamp bases for my Zenithstar 61ii
  • a pair of cable organisers for my ASIair Mini
  • a green pen laser holder that can be attached onto a vixen dovetail style clamp
Makes simple astrophotography procedures so quicker. 

This green holder can now stay permanently on my green laser pen. I will replace the back two bolts in next couple of days for something similar to those at front. 

The plans called for tiny metal inserts but I found just tapping and threading the holes worked well 

The holder slots in place on the 3 D printed saddle clamp (black)
The whole set up is replacing my red dot finder - which I am finding difficult to use at times because it requires me bending down at very awkward angles. 
I am very aware that using a green pen laser is not without its problems and is a contenious issue - so this is a trial. 

The red ASIair cable organisers - a Godsend frankly


Three black tripod leg clamp bases with sticky velcro attached. 
I can then just push my power banks onto the legs (they have sticky velcro on back of them as well) 
I can even transport the tripod in the car with the power banks already attached 

Saturday, 17 January 2026

Can we turn our astrophotography learning curve into structured tiers of learning?

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Astrophotography ‘Experience Tiers’ with Integrated ‘Gear Ladders’

Learning astrophotography can feel a little like navigating the night sky without a star chart. You know there are incredible destinations out there - but it’s not always clear where you are, how far you’ve come, or which direction to head next.

As an educator of over forty years, I’ve long been fascinated by how people progress when learning new knowledge and skills. Recently, that curiosity has turned toward my own journey into astrophotography. In a previous post, “Is Astrophotography Hard?” (https://undersouthwestskies.blogspot.com/2026/01/discussion-is-astrophotography-hard.html ), I explored the common challenges beginners face when entering this exciting hobby and what the typical learning journey might look like, based on my own experiences.

In this post, I’d like to take that thinking a step further.

Is it possible to identify clear experience tiers in astrophotography—stages of learning that help beginners and intermediate astrophotographers understand where they are and what comes next?

Think of this as a learning ladder, or perhaps a series of stepping stones across a river. Each tier represents a combination of knowledge, skills, and equipment that can help us move forward with more confidence and less frustration.

In this article, I share:

  • A proposed tiered structure based on astrophotography knowledge and practical skills
  • How each learning tier might align with astrophotography gear choices that support progress within - or to - the next level

These ideas are very much exploratory. I’m starting from a few simple premises.

First, there is an extraordinary amount of high-quality astrophotography advice available - online, in books, and through local astronomy and photography clubs. Second, most of us learn reactively: we search for answers only when we hit a problem. Finally, Astrophotographers, by nature, are excellent problem-solvers.

However, these approaches can be haphazard. Without a clear sense of where we are now and where we want to go, it’s easy to feel overwhelmed or discouraged early on.

This is where progression-tier thinking comes in.

I should be clear: I still consider myself a beginner. Some of what follows may feel like educated guesswork. But this framework is my attempt to map out the astrophotography learning journey -from first exposure to growing confidence - so I can better understand my own next steps.

I warmly invite you to discuss, constructively critique, and contribute your own ideas in the comments at the end of the post. If we combine our perspectives, perhaps we can build a clearer roadmap for all beginners in the wider astrophotography community.

As always - clear skies, stay safe, and enjoy the wonder above.

Steve


Tier 1 – Curious Beginner

Core goal: Capture the night sky and understand fundamentals.

🌌 Wide-Field

Typical Gear

  • DSLR or mirrorless camera
  • 14–35mm fast lens (f/1.8–f/2.8)
  • Tripod

Capture Skills

  • Manual focus at infinity
  • Exposure control (ISO, aperture, shutter)
  • Rule of 500 / NPF
  • Basic composition with foreground

Processing Skills

  • Lightroom / basic Photoshop
  • White balance correction
  • Contrast & clarity
  • Single-frame noise reduction

 

🔭 Deep-Sky

Typical Gear

  • DSLR or mirrorless
  • Telephoto lens (70–300mm)
  • Tripod

Capture Skills

  • Target recognition (Moon, clusters)
  • Understanding sky rotation
  • Short exposures to avoid trailing

Processing Skills

  • Cropping and basic tonal edits
  • Minimal sharpening

Learning limits of untracked imaging

🪐 Planetary / Lunar

Typical Gear

  • DSLR or mirrorless
  • Telephoto lens or small telescope
  • Basic eyepiece projection (optional)

Capture Skills

  • Manual focus
  • Exposure control for bright targets
  • Capturing Jupiter moons / lunar detail

Processing Skills

  • Basic sharpening
  • Simple exposure blending for Moon

 

Tier 1 – Curious Beginner

Failure mode: Expectation vs reality gap

Common Failures

  • Stars not sharp → misfocus at infinity
  • Images noisy → high ISO + single exposure
  • Milky Way barely visible → light pollution shock
  • Frustration from comparing to online images

Root Causes

  • No understanding of signal vs noise
  • Trusting autofocus or hard infinity stops
  • Underestimating light pollution

Fixes (Not Gear)

  • Learn live-view focus techniques
  • Accept stacking necessity
  • Shoot at darker locations
  • Reset expectations

 

Tier 1 – Curious Beginner

Symptom: “My photos look nothing like what I expected.”

Capture Recovery Checklist

  1. Switch to manual focus
  2. Zoom in on a bright star in live view
  3. Refocus after temperature changes
  4. Lower ISO, lengthen exposure
  5. Shoot RAW only

Processing Recovery Checklist

  1. Reset all sliders to zero
  2. Fix white balance first
  3. Apply contrast before noise reduction
  4. Avoid clarity/texture until last

Stop here if: stars are sharp and sky detail appears.

 

 

Why People Stall at Each Tier

Tier

Most Common Stall Reason

1 → 2

Unrealistic expectations


Tier 2 – Entry-Level Imaging

Core goal: Increase signal through tracking or stacking.

🌌 Wide-Field

Typical Gear

  • Star tracker (SkyTracker / Star Adventurer class)
  • Ball head or wedge
  • 14–50mm fast lens
  • Intervalometer

Capture Skills

  • Rough polar alignment
  • Multi-minute exposures
  • Sky vs foreground separation
  • Session planning (moon phase, location)

Processing Skills

  • First stacking attempts
  • Gradient struggles
  • Color balancing

Noise reduction via stacking

🔭 Deep-Sky

Typical Gear

  • Entry-level equatorial mount
  • Small refractor or telephoto lens
  • DSLR or mirrorless

Capture Skills

  • Tracking fundamentals
  • Framing large DSOs
  • Capturing multiple subs

Processing Skills

  • DeepSkyStacker / Siril
  • Darks and bias frames
  • Basic histogram stretching
  • Star bloat issues

 

🪐 Planetary / Lunar

Typical Gear

  • Small-to-medium telescope (Mak / SCT / refractor)
  • Planetary camera (entry-level)
  • Basic Barlow

Capture Skills

  • Video capture
  • Region of interest (ROI)
  • Awareness of collimation

Processing Skills

  • AutoStakkert! stacking
  • RegiStax wavelets (heavy-handed)
  • Limited color control

 

Tier 2 – Entry-Level Imaging

Failure mode: “I bought tracking—why isn’t it amazing?”

Common Failures

  • Polar alignment errors
  • Overlong subs causing star trailing
  • Poor framing due to rushed setup
  • Processing gradients overwhelming the image

Root Causes

  • Treating trackers/mounts as “plug and play”
  • No exposure optimization
  • Learning stacking after shooting poor data

Fixes

  • Practice polar alignment repeatedly
  • Shorter subs, more of them
  • Learn gradient removal early
  • Inspect subs before committing a whole night

 

Tier 2 – Entry-Level Imaging

Symptom: “Tracking didn’t fix my images.”

Capture Recovery Checklist

  1. Re-do polar alignment from scratch
  2. Shorten sub-exposure length
  3. Inspect each sub for trailing
  4. Confirm tripod stability
  5. Reframe after alignment

Processing Recovery Checklist

  1. Stack without calibration (test)
  2. Stack with calibration (compare)
  3. Check for uneven flats
  4. Remove gradients before stretching
  5. Stretch slowly in multiple passes

Stop here if: stars are round in stacked linear image.

 

 

Why People Stall at Each Tier

Tier

Most Common Stall Reason

2 → 3

Poor fundamentals


Tier 3 – Competent Amateur

Core goal: Repeatable results and controlled workflows.

🌌 Wide-Field

Typical Gear

  • High-quality tracker or small EQ mount
  • Fast prime lenses
  • Portable power setup

Capture Skills

  • Accurate polar alignment
  • Aperture optimization
  • Multi-night sky data
  • Panoramas & mosaics

Processing Skills

  • Sky-only stacking
  • Foreground blending
  • Gradient removal

Star size control

🔭 Deep-Sky

Typical Gear

  • Reliable EQ mount
  • Autoguiding setup
  • Modded DSLR or OSC astro camera
  • Small refractor (60–80mm)

Capture Skills

  • Guiding calibration
  • Exposure optimization
  • Consistent calibration frames
  • Session planning by altitude & moon

Processing Skills

  • Nonlinear stretching
  • Color calibration
  • Noise reduction with masks

Early star/background separation

🪐 Planetary / Lunar

Typical Gear

  • Medium-to-large aperture telescope
  • Dedicated planetary camera
  • Motorized focuser (optional)

Capture Skills

  • Seeing evaluation
  • Accurate focus (Bahtinov or live metrics)
  • Regular collimation

Processing Skills

  • WinJUPOS derotation
  • Controlled wavelets
  • RGB alignment
  • Artifact suppression

 

Tier 3 – Competent Amateur

Failure mode: Hidden system inefficiencies

Common Failures

  • Inconsistent results night-to-night
  • Calibration frames not matching lights
  • Guiding chasing seeing
  • “Good but never great” images

Root Causes

  • Poor repeatability
  • Over-aggressive guiding settings
  • Incomplete understanding of calibration theory

Fixes

  • Standardize capture routines
  • Measure guiding RMS vs image scale
  • Validate flats every session
  • Log session parameters

 

Tier 3 – Competent Amateur

Symptom: “Results vary wildly between nights.”

Capture Recovery Checklist

  1. Verify guiding RMS vs image scale
  2. Disable aggressive guiding corrections
  3. Confirm focus after meridian flip
  4. Dither is enabled and working
  5. Check cable drag and balance

Processing Recovery Checklist

  1. Inspect linear image before stretch
  2. Confirm flats match optical train
  3. Remove gradients before color work
  4. Separate stars from background (if needed)
  5. Apply noise reduction before strong stretch

Stop here if: linear image already looks clean.

 

 

Why People Stall at Each Tier

Tier

Most Common Stall Reason

3 → 4

Workflow inconsistency


Tier 4 – Advanced Astrophotographer

Core goal: Maximize data quality and efficiency.

🌌 Wide-Field

Typical Gear

  • High-end tracker or full EQ mount
  • Full-frame camera
  • Narrowband filters for wide-field
  • Precise polar alignment tools

Capture Skills

  • Multi-night mosaics
  • Narrowband wide-field capture
  • Consistent framing
  • Advanced planning

Processing Skills

  • Linear workflows
  • Star removal & recomposition
  • Advanced color mapping
  • Noise modeling

 

🔭 Deep-Sky

Typical Gear

  • Premium EQ mount
  • Mono camera + filter wheel
  • Autofocus system
  • Narrowband filters

Capture Skills

  • Sub-length optimization per filter
  • Accurate dithering
  • Multi-night integration
  • RMS and seeing monitoring

Processing Skills

  • Deconvolution
  • SHO palette control
  • Complex masking

Star morphology management

🪐 Planetary / Lunar

Typical Gear

  • Large aperture SCT or Newtonian
  • ADC (Atmospheric Dispersion Corrector)
  • High-speed camera
  • Precision collimation tools

Capture Skills

  • Optimal focal ratio selection
  • Seeing-limited capture strategy
  • Long-session planning

Processing Skills

  • Multi-session derotation
  • Deconvolution

Subtle wavelet layering

Tier 4 – Advanced Astrophotographer

Failure mode: Complexity overload

Common Failures

  • Overprocessing artifacts
  • Deconvolution ringing
  • Narrowband color imbalance
  • Time spent fixing data instead of capturing good data

Root Causes

  • Applying advanced tools without diagnostics
  • Forcing SHO palettes
  • Insufficient integration per filter

Fixes

  • Evaluate data quality before stretching
  • Simplify workflows
  • Increase total integration time
  • Use reference images for color sanity checks

 

Tier 4 – Advanced Astrophotographer

Symptom: “Data looks good, final image looks bad.”

Capture Recovery Checklist

  1. Review sub-exposure stats per filter
  2. Check integration time balance (RGB/Ha/etc.)
  3. Confirm dithering scale
  4. Evaluate seeing logs
  5. Reject poor nights instead of fixing them

Processing Recovery Checklist

  1. Revert to linear image
  2. Disable deconvolution temporarily
  3. Check star masks for leakage
  4. Reduce processing step count
  5. Compare against reference images

Stop here if: artifacts disappear in simpler workflow.

 

 

Why People Stall at Each Tier

Tier

Most Common Stall Reason

4 → 5

Overcomplexity


Tier 5 – Expert / Technical Imager

Core goal: System optimization and intentional output.

🌌 Wide-Field

Typical Gear

  • Precision mount
  • Sensor tilt/backfocus correction tools
  • Automated capture software

Capture Skills

  • Custom mosaic design
  • Data consistency across months
  • Extreme faint dust capture

Processing Skills

  • Photometric color calibration
  • Advanced gradient modeling
  • High-resolution panoramas
  • Personal aesthetic control

 

🔭 Deep-Sky

Typical Gear

  • Observatory-class mount
  • Fully automated imaging system
  • Advanced guiding and focus control

Capture Skills

  • End-to-end automation
  • Optical tuning
  • Drizzle integration
  • Scientific-grade datasets

Processing Skills

  • Custom PixInsight scripts
  • Signal-to-noise optimization
  • Sophisticated star control workflows

 

 

🪐 Planetary / Lunar

Typical Gear

  • Custom planetary rigs
  • Optimized optical trains
  • Ultra-high frame-rate cameras

Capture Skills

  • Optimal sampling theory applied
  • Seeing statistics awareness
  • Precision thermal control

Processing Skills

  • Multi-channel blending
  • Physical color accuracy

Advanced deconvolution theory

Tier 5 – Expert / Technical Imager

Failure mode: Diminishing returns

Common Failures

  • Obsessing over marginal gains
  • Endless equipment tuning
  • Data perfectionism blocking completion
  • Images technically perfect but emotionally flat

Root Causes

  • Chasing numbers instead of intent
  • Over-optimization
  • Losing artistic direction

Fixes

  • Define intent before capture
  • Stop tuning when performance is within tolerance
  • Finish projects
  • Solicit external critique

 

Tier 5 – Expert / Technical Imager

Symptom: “Everything is technically correct, but it’s not working.”

Capture Recovery Checklist

  1. Verify system hasn’t drifted out of tolerance
  2. Re-measure tilt and backfocus
  3. Review automation logs
  4. Confirm gain/exposure still optimal
  5. Re-test with a known easy target

Processing Recovery Checklist

  1. Process a subset of the data
  2. Disable custom scripts
  3. Use default parameters
  4. Evaluate SNR numerically
  5. Finish the image deliberately

Stop here if: simpler processing looks better.

 

 

Why People Stall at Each Tier

Tier

Most Common Stall Reason

5 → 6

Loss of experimentation


Tier 6 – Mentor / Master

Core goal: Teaching, innovation, or scientific contribution.

🌌 Wide-Field

Typical Gear

  • Observatory-grade wide-field systems
  • Robotic capture pipelines

Capture Skills

  • Survey projects
  • Ultra-faint IFN imaging
  • Large-scale mosaics

Processing Skills

  • Workflow design
  • Teaching composition and processing
  • Publication-quality results

 

🔭 Deep-Sky

Typical Gear

  • Custom observatories
  • Research-grade instrumentation

Capture Skills

  • Precision photometry / astrometry
  • Scientific collaboration

Processing Skills

  • Technique innovation
  • Reference-quality datasets
  • Instruction and mentorship

 

🪐 Planetary / Lunar

Typical Gear

  • World-class aperture systems
  • Custom cameras and optics

Capture Skills

  • Pushing diffraction limits
  • Professional seeing analysis

Processing Skills

  • New technique development
  • Educational content creation

Benchmark planetary imagery

 

Tier 6 – Mentor / Master

Failure mode: Stagnation through mastery

Common Failures

  • Repeating the same workflows
  • Innovation paralysis
  • Burnout from perfection standards
  • Teaching without updating techniques

Root Causes

  • Comfort with known success
  • Reduced experimentation
  • Overcommitment to mentoring or publishing

Fixes

  • Deliberate experimentation
  • Cross-discipline learning
  • Collaborative projects
  • Periodic skill reset challenges

 

Tier 6 – Mentor / Master

Symptom: “Progress feels stagnant.”

Capture Recovery Checklist

  1. Change target type or scale
  2. Image in suboptimal conditions intentionally
  3. Remove automation for one session
  4. Collaborate on shared data
  5. Set experimental goals

Processing Recovery Checklist

  1. Process someone else’s raw data
  2. Revisit an old dataset with new tools
  3. Teach a workflow out loud
  4. Break your own rules
  5. Publish something imperfect

Stop here if: curiosity returns.

 

 



Emergency Cross-Tier Checklist

Use this when nothing makes sense.

  1. Check focus
  2. Check tracking
  3. Check calibration frames
  4. Check gradients
  5. Check expectations