Imaging session IC 63 The Ghost of Cassiopeia

 Blogger isn't always the most intuitive platform to navigate - but it is free and simple to use and manage. 

To help you find information quickly on this blog, you can

• use the search bar using key words e.g. Asiair mini
• use the blog menu list by date 
• use this page which will be regularly updated https://undersouthwestskies.blogspot.com/2025/12/want-to-find-something-quickly-on-my.html
• visit my home page https://undersouthwestskies.blogspot.com/p/welcome-to-my-astronomy-and.html

Imaging IC 63 – The Ghost of Cassiopeia

A few nights ago, I finally met up with two exceptionally talented astrophotographers - WA Emery Photography and Snapadile Dundee Photography - down at one of my favourite haunts: Wembury Beach on the South Devon coast. It’s the sort of place where the sky feels close enough to touch, like someone has lifted the lid off the world and left the universe steaming gently in the cold night air. Both gents have their own Facebook page by the way, if you are interested in seeing some of their astrophotography work. 

These two know their craft inside out. Spending time with them is like sitting beside some seasoned sailors I know, who can read the sky the way others read newspapers. Luckily, I’m a lifelong learner—happiest with a notebook full of new ideas, and a mind grappling with fresh tricks and techniques.

WA happens to own the same mount as me—the EQM-35 Pro. His was bought new and ‘serviced’ by Dark Frame Ltd; mine is a well-travelled third-hand veteran that’s survived three different owner styles!  Anyone who owns this mount knows balancing it can feel, on occasions, like coaxing a rusty gate to swing smoothly - thanks to Sky-Watcher’s famously “thick” factory grease in both RA and DEC.

(I have done a beginners guide to doing a meridian flip with your ASIair Mini - here - https://undersouthwestskies.blogspot.com/2025/12/beginner-tutorial-how-to-set-up.html )

To my surprise, my old mount wasn’t quite the cantankerous creature I believed it to be. After WA let me try balancing his setup, mine suddenly felt less like a “drifting spacecraft fighting micro-gravity tumble and more like a mount settling calmly into alignment.”

I started imaging IC 63, the Ghost of Cassiopeia, at around 19:00. For a while, everything ran beautifully. Then came the meridian flip at 22:00 - and the night then suddenly unravelled like a dropped ball of string.

I’m convinced meridian flips on the ASIAir Mini qualify as a dark art. That few minute lead up to the flip – the app timer taunting me, watching my confidence peak… only to be let down after flip time passes – crushing disappointment!

WA’s flip was perfect, effortlessly done, as if ASIAir itself were bowing in respect to his considerable knowledge and professionalism. Mine? My mount stared at me with all the enthusiasm of a mule refusing a steep hill. I had to flip manually, losing twenty minutes reframing. Then the guiding decided to misbehave. Star trailing everywhere. No tweak, nudge, setting, or prayer could fix it. Maddening. Infuriating actually!

Regardless of my technological stupidity and mount mutiny, the night itself was pure magic - crisp, cold, and clear. The new crescent Moon dipped behind the Great Mewstone around 20:00, scattering a last golden shimmer across Wembury Bay like an artist dragging a paintbrush of light golden hues over dark water.

At around 19:00 we caught sight of a Starlink launch low on the southwest horizon - a surreal greenish glow followed by a pearl-string parade of fast-moving satellites racing into lower Earth orbit. For a moment, it felt like the universe was staging its own UFO sci-fi theatrical moment just for us.

Between sips of hot coffee and glances at each other’s ASIAir screens, I learned settings and functions I didn’t even know existed. A proper steep learning curve - but a satisfying one. Despite the guiding wobbling, I managed steady 7-minute exposures, though it’s clear my mount is ready for that long-overdue service; WA was pulling off flawless 10-minute subs like it was nothing.

As the temperature dropped, the cold crept up from the gravel car park, chilling our bones, despite all our thermal layers and double duvet jackets. Breath plumed into silver clouds. Hands stiffened. But the Primus jet boil, flasks of hot drinks, and an unhealthy quantity of snacks kept the icy bite at bay.

I can’t speak for WA or Snapadile, but I loved every moment. Their advice, patience, and generosity made the night feel less like a solitary mission and more like a shared adventure beneath a friendly sky. Thanks guys. It was great meeting you both; masters of your craft and generous with your tips. Appreciated.

 

Equipment Used

• Canon 800D with clip-in Optolong L-eNhance filter
• William Optics Zenithstar 61II + 61A field flattener
• Sky-Watcher EQM-35 Pro mount
• ASIAir Mini + ZWO 120mm guide camera + RVO 32mm guide scope
• Celestron Lithium Pro power tank
• Dew bands (main + guide scope)
• Two small power banks dedicated to dew bands
• Dummy battery + power bank for the Canon 800D
• MSM green laser pen with polar alignment adapter
• Sky-Watcher right-angled polar viewer
• Neewer intervalometer

Shooting Details

• 15 × 420″ lights at ISO 1600
• 15 darks
• 25 bias
• 25 flats

 

Sometimes I get so excited to start imaging that I forget to do the basics. “More haste, less speed” - a lesson the night drove home. I checked my test shots on the rear viewer, but not the histogram, and only later realised everything was slightly underexposed. The histogram peak was kissing the left edge—not clipped, thankfully, but not ideal. Longer subs or ISO 3200 would’ve made a world of difference.

Still… even with technical gremlins, underexposed frames, and a rebellious meridian flip, it was a night full of learning, talk, laughter, and starlight. The Ghost of Cassiopeia may be faint and elusive, but the memories from that cold Devon beach feel anything but. A cracking night, top stuff.

I have fallen behind with my post editing recently, but I will add my first effort on this DSO as soon as possible - so keep checking back on this page to see a 'first' result. I will also share my post editing work flow of the image as well. 

Update: well here is the final image

This is how it came out of post editing using Siril 1.4. YES! I have updated to Siril 1.4 and I have also downloaded the SetiAstro Cosmic Clarity Suite Pro as well! 

Huge step forward and lots of time following various Youtube channels to understand the basics.  I am currently writing/researching my final workflow order and when I have finalised it - I will publish it as a separate post. Suffice to say that the above image was my first attempt. 

So to the image below: 

My second attempt with some finishing off in Affinity Photo. I think this image is still too noisy and the nebula is overcooked - I overstretched it - again! But it is an improvement is it not. Maybe you don't. 

Let me know which image you think looks better and why - in the comment box below. Also drop in any tips to help us improve images such as these using SIRIL 1.4 and the Cosmic Clarity suite with GraXpert too. 

In the meantime, clear skies to you all, stay safe out there and have great fun observing and imaging

Steve  PlymouthAstroBoy 

PS: Finally, to the videos that helped me get started on the new Siril Version with Seti Astro python scripts - here they are - I suggest you subscribe to this guy if you haven't done so already - wonderful stuff - Astroislander 

and don't forget this channel - an absolute game changer where learning Siril is concerned: 

Deep Space Astro 

Postscript: 

I have switched over to SIRIL 1.4 at long last - you can read a recent post about my current workflow practice.  This new version has Veralux Hypermetric stretching.

So here is the final image using exactly the same data as above. 

What do you think? Which image do you prefer and why? Have you used Veralux stretching yet - if so - how did you find it? Drop your tips, thoughts and observations in a comment below and in the meantime, as always, stay safe, have fun and clear skies 

Steve 

Technique tutorial - how to set up a meridian flip on a ZWO ASIair Mini

 Blogger isn't always the most intuitive platform to navigate - but it is free and simple to use and manage. 

To help you find information quickly on this blog, you can

• use the search bar using key words e.g. Asiair mini
• use the blog menu list by date 
• use this page which will be regularly updated https://undersouthwestskies.blogspot.com/2025/12/want-to-find-something-quickly-on-my.html
• visit my home page https://undersouthwestskies.blogspot.com/p/welcome-to-my-astronomy-and.html

How to Set Up Meridian Flip in the ASIAIR Mini

My experience of Meridian flips using the ASIair Mini and my EQM – 35- PRO mount has not been a good one thus far – twice I’ve failed to get a meridian flip to work. However, a few nights ago I saw what it should look like and gained some useful tuition from WA Emery, when we were both imaging down at Wembury.

So, in this post, I go through

·       What the meridian flip is

·       What you need to check before programming one into your ASIair

·       How to make the settings changes

·       What happens during the flip

 

Let’s get stuck straight in then:

A meridian flip is an automatic manoeuvre that slews the telescope to the opposite side of the mount when the target crosses the North-South meridian; preventing a collision between rig and mount and continuing your imaging session safely.

 

Before you start, make sure:

·       Your mount supports GoTo and ASCOM/EQMod protocol when used with ASIAIR

·       Your mount is correctly balanced on both sides

·       You’ve done a successful polar alignment

·       You’ve checked that plate solving is working and is correct

·       Your time, location, and mount parameters are correct in the ASIAIR app

To program the flip:

·       Connect Your Mount in ASIAIR as normal

·       power everything up and open the ASIair app

·       Connect the ASIAIR Mini to your mount (via USB cable or WiFi depending on mount).

·       Confirm mount is set to "Equatorial" mode.

 

This will all ensure that your ASIAIR knows the mount’s exact position and orientation to calculate when the meridian will be crossed.

 

To enable the Meridian Flip in the app:

 

·       ASIAIR App → Mount → Meridian Flip Settings (may be AMF – auto meridian flip)

·       Toggle AMF to on - This tells ASIAIR to monitor the mount’s RA position and automatically execute a flip when needed.

·       Enable Auto-Guiding Interaction – mount – flip settings menu – ‘stop guiding before flip’ - you need to enter the number of minutes you want to stop guiding before the flip – I normally do it 3 minutes before the flip time – which you can find at the bottom of the app screen. Your ASIair app and mount will work together now to identify when your imaging object will cross the N/S meridian – and it will stop the guiding (but not the tracking) X minutes before hitting the meridian line.

·       “Do AMF X minutes after Meridian” – this is how long you want your mount/guiding to wait after passing the meridian before slewing to target once more, plate solving and resuming guiding and shooting images.

Next:

·       “Recalibrate After Flip” is optional (usually not needed with high-quality mounts) but I do it because it prevents guiding from fighting the flip and ensures post-flip guiding resumes cleanly on the opposite pier side. Again, enter a time for when the mount/guiding will resume after the meridian flip.  

Points to note:

The bottom of your screen shows the time to elapse before a meridian flip is required.  I always watch my meridian flip to ensure no cables snag during the process. Remember, if your imaging exposure time risks crossing the meridian flip time, the ASIair will stop imaging before the flip so that you don’t get a partial image. This means it could be a lengthy wait before things resume the other side of the flip – e.g. 3 mins stop before flip +cancelling a 5mins exposure+ 5mins after flip+ restoring guiding and plate solving – you could lose 15 – 20 minutes of imaging time for the whole process to complete.

 

When you have entered your settings, all you need do is then start an imaging plan or autorun as you’d normally do.

Once started, the ASIAIR will display a Meridian countdown beneath the mount info (e.g., “Meridian in 32m”). The flip will only occur during an active imaging session.

 

What Happens During the Flip (Automatic)?

 

When the flip moment arrives, ASIAIR will:

·       Finish the current exposure

·       Stop guiding

·       Slew the mount to the opposite side

·       Plate-solve to re-centre your target

·       Restart guiding (with/without recalibration based on your settings)

·       Resume imaging

 

I hope this helps – this is the crib sheet for my next outing to ensure I haven’t forgotten to do anything. I will let you know how I get on.  You can find another tutorial here about the ASIair Mini which I wrote back along - https://undersouthwestskies.blogspot.com/2025/02/beginners-guide-to-using-autoguiding.html

In the meantime, as always, if I have forgotten any stages, got anything wrong or you just have some further tips to make a meridian flip experience better, do drop a comment below so we can all better learn.

Clear skies, stay safe and have enormous fun as always

Steve

PS I found this video useful

https://www.youtube.com/watch?v=nOZFmxMBbZM

What's in the night sky for December 2025?

 Blogger isn't always the most intuitive platform to navigate - but it is free and simple to use and manage. 

To help you find information quickly on this blog, you can

• use the search bar using key words e.g. Asiair mini
• use the blog menu list by date 
• use this page which will be regularly updated https://undersouthwestskies.blogspot.com/2025/12/want-to-find-something-quickly-on-my.html

What’s in the night sky for December 2025?

December 2025 features the Geminids meteor shower peaking around December 14th, the Super Cold Moon on December 4th, and the winter solstice on December 21st. Key celestial objects to find are bright Jupiter in the east and Saturn in the west, with Mercury visible in the morning sky before its greatest western elongation on the 7th. 

Meteor showers

• Geminids: A major highlight, peaking around December 14th with up to 120 meteors per hour possible.
• Astrophotography tip: The peak occurs when the Moon is a thin crescent, providing excellent dark skies for capturing this shower.
• The Ursids:  Also active, peaking around December 22nd with lower rates (up to 10 meteors per hour). 

Planets

• Jupiter: The brightest object in the evening sky, visible in the east after sunset and moving towards opposition in January.
• Saturn: Visible in the south-west in the early evening. It sets earlier in the month as December progresses.
• Astrophotography tip: Look for the Pleiades and Hyades star clusters in the constellation Taurus
• Mercury: Best viewed in the pre-dawn hours in the southeastern sky, with its greatest western elongation on December 7th.
• Neptune: Will require binoculars or a telescope to spot, located near Saturn in the constellation Pisces. 

Other events

• Super cold moon: The Full Moon occurs on December 4th and is a Supermoon, meaning it appears larger and brighter than a typical Full Moon.
• Winter Solstice: Occurs on December 21st, marking the shortest day of the year in the Northern Hemisphere.
• Andromeda Galaxy: Can be seen in the southern sky on darker nights. 

Astrophotography tips

• Meteor showers: The Geminid meteor shower is ideal for photography due to its high rate and the favorable moon phase.
• Planets: Consider capturing Jupiter or Saturn, but remember they are best viewed from a location with less light pollution.
• Deep sky objects: The Andromeda Galaxy and the Pleiades star cluster are excellent targets for astrophotography, but require darker skies. 

1st Dec		This blog gives some excellent astrophotography targets for the month: https://starwalk.space/en/news/december-deep-sky-objects
2nd	Ganymede’s shadow crosses Jupiter’s disc 0610 – 0925.	This website adds further to the calendar details shared here: https://starwalk.space/en/news/night-sky-tonight-december
4th	98% lit waxing gibbous moon occults M45 Pleiades from around 0300. Uranus is 4.6” south of the moon at this time. Full moon at 2315 – a perigee full moon today	If you want to image Orion during December, this website gives so good targets to try and image or visually observe: https://elanvalley.org.uk/uncategorized/eyes-on-the-night-sky-december-2025/
6th	Ganymede reappears from behind Jupiter around 0235
7th	Mercury reaches greatest western elongation – 20.7 degrees west of the sun in the morning sky - meaning it is at its farthest point from the Sun from our perspective.  87% lit waning gibbous moon this evening – sitting 3.5 degrees from Jupiter around 1900.	The ideal time for spotting Mercury will be just before dawn on 7 December, looking to the east. However, its not prudent to observe Mercury through a telescope as it will be very close to the sun and you risk pointing your scope directly at the sun as it rises
8th	Titan transits Saturn between 1730 – 2350 Callisto begins transit of Jupiter between 0210 and 0620
9th	Low altitude views of Saturn around 2348. Should see Titan and Rhea as well.
10th	Regulus is occulted by the 66% lit waning gibbous moon around 0718 during brightening dawn twilight
12th	Ganymede is eclipsed by Jupiter’s shadow around 2355 – reappearing around 0558 on 13th.
14th	Peak of Geminid meteor shower – with little interference from the moon (in a waning crescent phase)
16th	Titan occulted by Jupiter’s globe – 1623. Reappears 2205. Callisto occulted at 0744. Ganymede completes transit of planet – 1800 to 1950
21st	December Solstice
22nd	Peak of Ursid meteor shower
23rd	Ganymede’s shadow transits Jupiter’s disc 1947 to 2308. Ganymede does its transit 2120 to 2309
24th	Titan transits Saturn 1625 to 2305 Io, Callisto all transit as Jupiter rises.
25th	Watch out for Santa and his sleigh transiting everything after dark!
30th	Ganymede’s shadow crosses Jupiter’s disc 2158 to 0123 on 31st. Ganymede itself transits 2300 to 0228 on 31st.

Sources "Sky at Night" and "High Scientific"

Imaging session on NGC 1499 The California Nebula

Blogger isn't always the most intuitive platform to navigate - but it is free and simple to use and manage. 

To help you find information quickly on this blog, you can

• use the search bar using key words e.g. Asiair mini
• use the blog menu list by date 
• use this page which will be regularly updated https://undersouthwestskies.blogspot.com/2025/12/want-to-find-something-quickly-on-my.html
• visit my home page https://undersouthwestskies.blogspot.com/p/welcome-to-my-astronomy-and.html

 A Night in the Back Garden Under the Stars

Target: NGC 1499, the California Nebula
Mood: Mischievous Backyard Astronomer

There are glamorous observatories on mountaintops… and then there’s my back garden: a patch of grass with a steep incline above it, and a band of trees that act like they own the southern horizon. A slice of sky that runs from the northwest around to the east. Everything else? Hidden behind a wall of woodland darkness, as if the universe pulled a curtain halfway across the stage. Frustrating? Absolutely. But also, oddly charming.

I often joke that imaging from the back garden is lazy astronomy—as if I’m somehow cheating the grand tradition of freezing atop windswept hillside car parks. Yet, every time I do it, I feel delightfully wicked, like a child raiding the biscuit tin when no one was watching. No packing the car. No driving at ungodly hours. Instead, I get to nip inside for a cuppa or catch a bit of TV while the mount gently whirrs away outside under the stars. The nightscape? Hooting owls, prowling cats, and the occasional fox strolling down from the woodland like it’s popping by to check on my guiding graph.

Shamefully luxurious behaviour… and I adore it.

A few months ago, in the spirit of “back garden decadence,” I upgraded the observing area. I installed three perfectly spaced patio slabs for my tripod. Then I brought some colourful 12mm children’s foam jigsaw mats to lay across the decking. Functional? Extremely. The deck turns into something between a skating rink and a death trap this time of year, and those mats keep me from performing accidental gymnastic routines while carrying expensive optics.

So, a few weeks back, on a crisp moonless night, I finally aimed for NGC 1499. From the kitchen table (aka mission control), I could see the mount through the window while stirring hot soup and basking in the warm red glow of my head torch. I seem to feel the cold more these days—an unexpected betrayal, considering how many winters, long ago, I spent stomping through snowfields or dangling from an ice axe on frozen waterfalls. Back garden astrophotography, therefore, feels like a snug loophole in the universe’s rules.

Despite the suburban light pollution, I managed several solid hours on the nebula over two nights. Below is the kit list for anyone curious—or for future me, when I inevitably forget which power bank ran what.

 

Equipment

• Canon 800D with clip-in Optolong L-eNhance filter
• William Optics Zenithstar 61II with 61A field flattener
• Sky-Watcher EQM-35 Pro mount
• Guiding: ASIAir Mini + ZWO 120mm guide cam + RVO 32mm guide scope
• Celestron Lithium Pro power tank
• Dew bands on main and guide scope
• Two small power banks dedicated to dew bands
• Dummy battery + power bank for the Canon 800D
• MSM green laser pen with polar alignment adapter
• Sky-Watcher right-angled polar viewer
• Neewer intervalometer

 

Imaging Data

Night One

• 30 × 360" lights
• ISO 1600
• 12 darks
• 20 bias
• 30 flats

Night Two

• 43 × 360" lights
• ISO 1600
• 15 darks
• 20 bias
• 30 flats

Guiding behaved surprisingly well for an un-serviced, third-hand mount. The RA axis is a little stiff – a bit like me – a ‘sometimes’ reluctant older bloke getting out of a comfortable chair. Nothing disastrous with guiding - RA hovered around 0.80, DEC around 0.90. Honestly, not bad considering I’m still getting acquainted with the ASIAir Mini and its app.

This was my very first rough post edit of the data and I’ll update this post further once I process the images properly; and I will share my full workflow - warts, wonders, and all. Stay tuned for a hopefully better edited California Nebula in all its crimson glory!

As always, collecting the data is the easy bit

Post editing is a dark, dark art though! 

I am still getting to grips with how SIRIL v1.2.6 works. Throw in GraXpert and then also learning how to use Affinity Photo 2 - and it all fries my brain.

As always, the same issues are cropping up in my post editing work flow - over stretching, noise etc. 

On the bright side? Two years ago I knew absolutely nothing about photography, astrophotography, basic astronomy - so I am making some progress - all be it is small baby steps! 

Postscript:

Since processing the above image - I have had another go studying Siril and refining my workflow. I have also started to understand Cosmic Clarity Suite Pro as well from Seti Astro 

So - here is my second edit on the data using the above programs - 

This image has used Veralux Hypermetric Stretching

This is supposed to use all of the availabe data captured and is more colour realistic 

I am just finishing researching and writing up my final workflow based on Siril -GraXpert-Cosmic Clarity - Affinity Photo and when finished I will put it in a post. 

Which image do you like best and why? Which one do you think is the most realistic? Do you use the above programs - if so do you have any tips to share? As always, drop a comment in the box below - I'd love to hear your views. In the meantime, cl;ear skies to y ou all, stay safe and have fun out there observing

Steve 

Equipment review: Samyang 14mm f/2.8 manual focus lens for milky way landscapes

 Blogger isn't always the most intuitive platform to navigate - but it is free and simple to use and manage. 

To help you find information quickly on this blog, you can

• use the search bar using key words e.g. Asiair mini
• use the blog menu list by date 
• use this page which will be regularly updated https://undersouthwestskies.blogspot.com/2025/12/want-to-find-something-quickly-on-my.html
• visit my home page https://undersouthwestskies.blogspot.com/p/welcome-to-my-astronomy-and.html

Samyang 14mm f/2.8 (Manual Focus) Review for Astrophotography

(Also known as the Rokinon 14mm f/2.8 in North America)

When it comes to astrophotography gear, we all have our checklists — usability under the stars, optical performance, portability, and durability. After all, we’re not just taking photos; we’re venturing into the dark, chasing starlight. But what really matters most in the field? And where does this budget-friendly wide-angle fit in?

In this review, I’ll:

• Give an overview of the lens
• Outline its main strengths
• Discuss its weaknesses
• And share my verdict on whether it’s worth it for beginner astrophotographers

Let’s dive in.

Overview

The Samyang 14mm f/2.8 ED AS IF UMC has earned a bit of a cult following among night-sky enthusiasts. It’s the kind of lens that shows up in countless astrophotography bags.

With its ultra-wide 14mm field of view and fast f/2.8 aperture, this lens captures sweeping nightscapes — from horizon-to-horizon Milky Way arcs to vast fields of stars. Despite its modest price, it punches well above its weight, capable of producing breathtaking images when treated with care. Some of my personal best Milky Way shots have come through this lens.

Key Specs:

• Focal length: 14mm (full-frame) / 21mm (APS-C equivalent)
• Max aperture: f/2.8
• Focus: Manual only (no autofocus or electronic contacts)
• Construction: 14 elements in 10 groups (3 high-refractive, 2 ED)
• Filter thread: None (bulbous front element)
• Weight: ~530 g
• Angle of view: ~115° (on full-frame)
• Weight - around 550g
• Material - mainly made of plastic 

Just look at all that glass. This lens is an absolute 'light gathering' beast

Strengths for Astrophotography

1. A window to the cosmos
At 14mm, the field of view is wide enough to swallow the Milky Way whole. On a full-frame camera, you can often fit the entire galactic core and horizon in one shot. This makes it ideal for those grand, cinematic night landscapes — the kind where the sky feels like an ocean and the foreground and tripod is your anchor

2. Excellent value for money
At around £250–£300, it’s hard to beat. It delivers genuine ultra-wide performance without breaking the bank — a rare find in astrophotography. It’s often the go-to “first Milky Way lens” for beginners on forums like Cloudy Nights and r/Astrophotography. One user summed it up nicely: “Cheap, manual, and sharp where it counts.”

3. Respectable coma control (for the price)
Even wide open at f/2.8, stars stay round and well-behaved in the centre, with only mild stretching toward the corners. It’s not flawless, but for its price class, it’s impressively restrained.

4. The beauty of manual focus
Because this lens is purely mechanical, there’s no risk of focus drift or accidental AF hunting in the dark. Once you’ve found that perfect infinity point (usually a hair before the hard stop), you can tape the ring and shoot all night. It’s wonderfully simple — one less variable to worry about under the stars.

5. Built like a tank
The all-metal construction and smooth focus ring make it feel solid and reliable. When you’re out in cold, damp, or even frosty conditions, fewer electronics mean fewer things that can go wrong.

Let's talk lens cap. Not one that easily slips into a trouser pocket is it?

Designed to fit over the large front petal rimmed lens area. 

As a consequence two things to be aware of - firstly - no screw threads for filters; and secondly - a nightmare if you want to do calibration frames as the petal design lets light through in the 'gaps'. 

Although I haven't done it yet, on my 'to do' list is cutting down a 3D printed bahtinov mast to fit around the petal hood to negate this issue. 

Weaknesses and Limitations

1. Heavy vignetting
At f/2.8, corners can be about 3 stops darker than the centre — something you’ll definitely notice in unprocessed Milky Way shots. Think of it as a flashlight beam effect that you’ll need to balance out in post-processing.

2. Soft corners
The centre sharpness is excellent, but the edges do suffer a bit of coma and stretching. Stopping down to f/4 or f/5.6 improves things, though at the cost of longer exposures or higher ISO.

3. Moustache distortion
The lens exhibits a distinctive “moustache” distortion — wavy and complex, especially visible with straight horizons or architectural elements. It’s mostly irrelevant for deep-sky shots, but if you like including landscapes or structures, some post-correction may be needed.

4. No electronic communication
No EXIF data, no aperture readout, no autofocus. Everything is manual. For astrophotography that’s fine — but worth noting if you’re used to modern digital convenience.

5. Filter limitations
That bulbous front element looks cool but makes using filters tricky. You’ll need a special 150mm holder if you want to use ND or gradient filters. For Canon DSLR users, clip-in filters are a handy workaround.

6. Sample variation
Quality control can be hit or miss — some lenses have slight decentring or uneven sharpness. Buying from a reputable retailer with an easy return policy is your best safeguard.

7. An inaccurate focusing ring 

On my lens, the focus ring is slow to rotate making manula focus adjustments at times tricky. The apparent depth of field is very large and so I find myself having to focus stack the foreground at times, using 'live view'. And, maybe its just my particular lens, but does anyone else find that the distance scale on the ring doesn't seem very accurate? I never just set it to infinity - as infinity - in reality seems to be a little bit back off the mark, hence the taped remninder ytou see on my lens cap! 

My Experience

This has been my main Milky Way lens for a while now — and honestly, it’s been a joy. On a tripod, it handles 15–30 second exposures beautifully. My copy shows only mild coma, easy to fix in post. Stars remain crisp and defined at f/2.8, which is usually where I leave it.

Mounted on a tracker, it shines even more. Sixty-second exposures are clean, and detail in the galactic core pops beautifully. I always tape the focus ring once it’s dialed in — a small ritual that pays off every time.

Verdict

For me, the Samyang 14mm f/2.8 has been one of the best investments I’ve made in astrophotography. It’s affordable, reliable, and capable of truly inspiring results. It’s not perfect — few things at this price point are — but it rewards patience and good technique. Think of it as a sturdy workhorse: not glamorous, but tireless and dependable.

For beginners, it’s a brilliant first step into the night-sky world.

If you’re ready to spend more, however, consider alternatives like the Sigma 14mm f/1.4 DG DN Art — purpose-built for astrophotography and two stops faster, allowing lower ISO and shorter exposures. The Sigma 14–24mm f/2.8 DG DN Art is another stellar (pun intended) option with great corner sharpness and flexibility, though it’ll cost you several times more than the Samyang.

Bottom line:
The Samyang 14mm f/2.8 is like a well-loved telescope — simple, rugged, and surprisingly powerful once you learn its quirks. For anyone looking to capture their first Milky Way, it’s a gateway to the stars.

Taken last year with my samyang 14mm lens