Welcome to UnderSouthWestSkies — an astronomy and astrophotography blog helping beginners and enthusiasts explore the night sky. Here you’ll find things like practical guides, deep sky observing notes, astrophotography workflows, and monthly sky events tailored for UK observers. Learning to capture your first long exposure image or planning your next night under the stars, this blog offers clear, accessible advice to support you on your learning journey into the cosmos. Drop me a comment Steve
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I got myself a bargain up at Tavistock Pannier Market.
I normally carry all my milky way gear in my Osprey Talon 33 rucksack - which has seen sterling service over the years.
There is nothing wrong with this rucksack at all - it just isn't designed for carrying photographic equipment as it is what I call a 'top-loader' i.e.; a large bag design - all one compartment loaded from the top. So, its a pain to have to constantly rummage around in it to find something!
So, I've been on the look out for a camera rucksack which would carry all my gear and most importantly be easy zip access - to compartments!
Only - I don't have a budget for one. In the space of a month recently we had to replace the fridge, the dishwasher, the microwave, the car windscreen and now the collapsed patio around the side of the house! 2026 is proving to be very 'expensive'.
All I needed was one 'compartmentalised' rucksack that can carry the gear and is comfortable to wear for around a two mile length 'walk-in' at most.
£12. A bargain.
It holds everything. Its pretty comfortable to wear. Nothing fancy. Not designed for long walk in's to isolated spots (I use my son's old Lowe Alpine two compartment rucksack for that - it carries photography gear in top section and clothing and stove gear in bottom one).
I replaced some of the elastic on the outer mesh pocket and two of the side straps for holding a tripod.
It will do.
I mean in my wildest dreams I buy a Lowe Pro specialist camera rucksack. Maybe I will have to wait a few more years until I've grown up to be a 'proper' milky way photographer - then I might be able to justify the expense.
We chase the stars … but the dark can bite back. Here’s
the safety guide every night‑shoot astrophotographer and/or astronomer needs.
The night Maggie nearly collected my life insurance!
We astrophotographers are a curious breed. We wander around
in the dark, often in remote places with narrow cliffside paths and trip
hazards galore - sleep‑deprived, laser‑focused on tiny screens, chasing photons
across the cosmos.
But how much attention do we give to our own safety? Is it
part of our astrophotography workflow, or just an afterthought as dawn breaks
on the eastern horizon?
Real‑World Encounters That Remind You Why Safety Matters
If you’ve ever been alone in a car park at midnight when a
convoy of youths turns up for donut driving, you’ll know the feeling. I’ve had
that happen on Dartmoor - unsettling doesn’t begin to cover it.
In Slovenia, while doing deep‑space astrophotography outside
the motorhome, I came face‑to‑face with a wild wolf - inquisitive,
intimidating, and only 30 yards away. The campsite warden at Plitvic Lakes
wasn’t joking when he said, “Pack up by 2:30a.m.” A bear that wandered through later was huge.
At Durdle Door, I slipped and fell down a slope - Maggie
almost collected the life insurance.
In Arizona, a rattlesnake encounter raised
my pulse faster than any meteor shower. In Utah canyon country, a farm alley
cat brushed against my legs at 3a.m.
- in mountain lion territory. Terrifying doesn’t quite
capture the emotion.
And the two guys on a motorbike at Wembury Beach car park?
Midnight, purposeful stride, adrenaline pumping - they only wanted a charging
cable for a flat smartphone. Idiots scared living daylights out of me.
You get the picture. The night sky is beautiful, but the
shooting location isn’t always benign.
My Safety Philosophy
I come from an outdoor education background — fieldwork,
Duke of Edinburgh expeditions, high‑mountain leadership, international travel.
So, my safety mantra is simple:
Plan like a mountaineer, move like a cautious, nervous
hiker and think like an emergency services worker/volunteer.
I assume I’ll be tired, cold, distracted, and at risk - and
I build safeguards around those assumptions. I know things will go wrong
eventually, so I make sure I’m findable, reachable, and able to help myself for
a few hours if needed. If rescue is required, I want to make it quick and
efficient - not a major search‑and‑hope scenario.
This needs some unpacking doesn’t it. It isn’t a comprehensive list and I’m not
trying to teach ‘granny to suck eggs’ either. I’m just saying ‘make risk
assessment and safety planning part of your normal astrophotography planning
workflow’. Give it the attention it needs!
Pre‑Trip Planning and Location Research
Scout
in daylight. Note paths, drops, loose ground, tide lines, gates,
livestock, and parking. Walk your route with your rucksack gear in mind.
If
you can’t visit, use maps. Satellite view and Street View reveal
cliffs, rivers, quarries, and awkward access points.
Check
access and ownership. Respect private land, fences, and locked gates —
sneaking in is unsafe and bad for the community.
Log
key info. GPS coordinates, nearest road or village, hospital distance,
mobile coverage (and where it drops).
Think of it as your mission briefing before venturing
into the dark.
Weather, Environment, and Night‑Specific Risks
Weather and Temperature
Don’t just check for “clear skies.” Look at cloud cover,
wind, temperature, humidity, and dew risk. High humidity and wind can turn
a safe night into a miserable one. In winter or coastal spots, hypothermia is a
real risk - dress for being still, not walking. Layer up: thermal base, hat,
gloves, warm socks, and maybe hand warmers or heated socks. Standing still
under the stars is colder than you think.
Terrain and Darkness
Human night vision is poor - cliffs and holes vanish into
shadow. Move slowly, test the ground, and avoid edges. Use a headtorch with
red mode to protect night vision, but keep a bright white option for
emergencies. Carry a backup torch and spare batteries - losing your only
light source is catastrophic.
Wildlife and Livestock
Stay aware. Rural sites host deer, foxes, badgers, cattle,
horses - and sometimes bigger wildlife. When touring dark‑sky sites in the
southwest USA, park rangers constantly reminded us: listen for movement.
Don’t corner animals; give them space. Keep food sealed - strong smells attract
unwanted visitors – in the UK I have had foxes, badgers and hedgehogs. It has
been bears, wolves and snakes elsewhere!
Personal Safety and Communication: “Being Findable”
Before you go, tell someone:
Where
you’re going (GPS or map link)
When
you expect to be back
What
car you’re in and where it’s parked
Set a rule: “If I haven’t texted by X time, start
checking.” That simple plan can save hours in an emergency.
Keep your phone charged and carry a power bank.
In remote areas, use a satellite communicator (I pair my Garmin inReach
with my phone for easier texting). Know your signal map - there are black holes
along the South Devon coast and Dartmoor.
Vehicle, Travel, and Fatigue Management
Driving at Awkward Hours
Between 2a.m.
and 4a.m. your
body hits its lowest alertness. Rest before driving home or sleep in the
vehicle if you’re exhausted - better a nap than a crash.
Vehicle Readiness
Treat your car like a mini base camp:
Blanket
or sleeping bag
Water
and snacks
Basic
tools and tyre kit
Ice
scraper or de‑icer in winter
Parking Safely
Don’t block roads or gates. Avoid soft verges that can
collapse or bog down your vehicle - especially in winter.
Gear Safety and Practical Strategies
Essential Safety Kit
Keep it simple but effective:
Headtorch
+ spare
Spare
batteries
First
aid kit
Emergency
blanket or bivvy bag
Power
bank
Whistle
Paper
map or offline map
Compass
(and know how to use it)
Snap
light stick
Garmin
inReach or similar
Working Safely in the Dark
Mark
tripod legs with reflective tape.
Route
cables so you won’t trip over them
Avoid
cliff edges - vegetation hides danger. (Ask me how I know!)
Keep
spare batteries warm in an inner pocket.
Don’t
drain your car battery with gear; use a dedicated power box.
Solo vs Buddy System
I’m a soloist by nature - always have been. But here’s the
contradiction: shooting with someone is safer.
Buddy System
Two sets of eyes and ears, shared navigation, and help if
you fall or get ill. Three people? Even better - one stays with the injured
person while another goes for help. And let’s be honest: two or three
astrophotographers are less likely to attract unwanted attention.
If You Must Shoot Solo
Double down on:
Location
research
Communication
backup (carry your satellite messenger on your person)
Check‑in
plan with someone at home
Be conservative with terrain - skip risky cliff‑edge
compositions. Choose spots within sight or calling distance of housing. Some
Dartmoor locations are remote and attract strange visitors at night - unsettling
doesn’t begin to describe it.
Minimise
light pollution - shield torches, use red light, and don’t blind fellow
astrophotographers. A sudden white flash can temporarily blind someone
near a cliff - politeness and safety go hand in hand.
Mental Safety and Mindset
Stay situationally aware. Don’t get so locked into your
camera that you miss sounds, movement, or weather changes. Every 10–15 minutes,
do a 360° scan - sky, horizon, ground, animals, people, weather. And
know when to abort. If wind picks up, fog rolls in, or you feel uneasy, leave.
The stars will wait; your safety won’t.
Simple Safety Checklist Before Every Night Shoot
Keep this note on your phone:
Location:
visited in daylight or researched; access legal and safe.
Plan:
start time, end time, route, “if I’m not back by…” rule.
Mindset:
ready to leave if conditions or gut feeling say “no.”
Final Thought
Astrophotography is about chasing light - but don’t let
darkness chase you back. Make safety part of your workflow, not an
afterthought. Because the best images are taken by photographers who live to
shoot another night. That is the way they gain experience and expertise!
As always, keep looking up - have fun and stay safe out there
The MSM Nomad: brilliant tracking, tiny body, big
personality — and yes, I did lose one of the laser caps in the grass. Here’s
what a full summer taught me.
MSM Nomad Star Tracker – A Summer Under the Stars
When I first reviewed the Move Shoot Move Nomad star
tracker, I’d only owned it for a couple of weeks. It was new, shiny, exciting,
exotic.
Now, after a full summer of Milky Way chasing across South
Devon, Cornwall and Dorset, I’ve gathered enough extra observations to reach
some valid conclusions about it.
My set up for the Nomad tracker
“My first observations – the need for extra accessories
doesn’t half mount up the costs of the overall package.”
“And some of those recommended additional accessories can
complicate set up”
This update is the additional bit of the original story review: the frustrations, the
surprises, the joys, the workflow, the gear.
The Accessory Avalanche
Or: “how can a simple tracker become a Russian nesting
doll of extras?”
The Nomad itself is compact, clever, and capable. But the
accessories? They multiply like gremlins after midnight. And if you’re not
careful during set up routines - they can also scatter across your shoot site.
“Some of the small bits such as the various screw on
caps to the laser pen - are so easy to drop – and lose! Go on ask me how I
know – no don’t bother!”
The Optical Polar Scope
If you want to shoot with longer lenses - say the Samyang
135mm - you’ll need the polar scope, and probably the counterweight kit, and
then the phosphorescent cap for the polarscope (that glows somewhat radioactively - placed
over the front of the polar scope, it lights up the field allowing the reticle
to be seen in silhouette.) You also need a bracket to attach the polarscope
to the Nomad. I
Basically, it is a complete additional accessories kit. Another
add‑on to the basic price of the Nomad.
(As an aside - I have a polarscope from another small
tracker which might work; and access to a 3D printer – and I can find 3D free
plans for printing off the bracket; all I would need is the polar illuminator cap
thingy – I will let you know how it goes!)
The Smartphone Holder
A clever idea: use your phone for polar alignment when
Polaris is hiding or if you are in the southern hemisphere. There are some
really good YouTube videos which extol the value of using the smartphone
holder. It is an extra cost though. My son-in-law 3D printed one for me and it
fits perfectly but my Pixel 6A seems to think Polaris is some way off where the
laser ends up being.
The Laser Pen (and its disappearing caps)
The Nomad laser is brilliant… until you drop one of its
caps. Then it becomes a treasure hunt in the dark. Don’t say I didn’t warn you!
Compactness: A Blessing and a Curse
Small body, big personality
The Nomad’s tiny size is wonderful - until your ball head
knob starts jousting with the tracker body.
I found that various ball head and ‘Z’ plate knobs and
levers can get in the way of the nomad body and/or the laser pen sighting line.
It’s annoying!
The Alyn Wallace Z‑Plate
A game‑changer… mostly. It helps aim the camera toward the
pole or zenith more easily, but one of its knobs (the small rotation one) loves
to collide with the Nomad top.
And yes - the Z‑plate blocks the laser beam. So, I have to rotate
everything out of the way to do a polar alignment – accessories which actually
interfere with each other – mildly irritating! Finally, I have had to 3D print
some extended levers to ensure that the plate screws on the hinges are tightly
locked down.
MSM recommend you get one. But, I wonder whether or not it
is really necessary? Is there a stability issue with it? I do wonder about
that. Using longer lenses? Then yes, in conjunction with counterweight kit, I
can see it being helpful. With just short lenses? Um – jury out!
“The one supplied is too small and too shallow.” Just
an opinion – I can easily accept it may be a case of operator error.
The Power Switch Surprise
Handle your rucksack roughly and the Nomad may switch itself
on. The upside? You discover it can run happily from a USB power bank.
Milky Way Landscapes: A Beginner’s Puzzle
I tried foreground + sky from the same tripod position - and
the universe said “nope”.
Post editing the two together seemed so complicated and
always ended in failure – with strange artifacts at the edgers of the sky photo.
I couldn’t quite work out how to do the foreground shot and then then tracked
shots immediately after.
Move a few metres from foreground location to shoot the sky
component? Suddenly everything works. Why? No idea. But it’s not the Nomad’s
fault - just one of those astrophotography mysteries, like why clouds appear
the moment I step outside. Again, I suspect it is operator error here.
Marketing: A Slightly Controversial Opinion?
After a season, I’m a bit disillusioned with MSM’s marketing?
The website makes the Nomad look like a
simple, low‑cost beginner tracker… until it then begins to subtly hint that you
need a wedge, a Z‑plate, maybe a phone holder, maybe a polar scope, maybe a
counterweight kit… and then it always seems to be discounted prices – which really
aren’t …….. I come away feeling it is a slight con job! You buy the basic
tracker and then discover the extras begin to build up. It isn’t quite the
low-cost tracker you thought it was, or that was being hyped to you on the
website and social media.
SkyWatcher sells a complete kit. MSM sells a menu – which
can be difficult to navigate for a beginner.
My set up - note the larger swiss-arc plate attached to base of Nomad so it better fits William Optics wedge; note too the wedge moujnted to a simple revolving swiss-arc clamp - making polar alignment so much quicker. The cable is a dummy battery one running to a powerbank that rests in the 'stone-bag' between the tripod legs.
And now the Positives? Oh, There Are Many
This is where the Nomad shines
Ease of Setup
Once you’ve practised, it’s fast. Really fast. I can set up
– shoot – dissemble – move location and repeat – several times in one night.
Tracking Accuracy
Pinpoint stars. No grinding. No backlash. Up to 4‑minute
exposures? Easy. Just ensure that the Camera, Ball head, Z-plate – all sit at
the centre of gravity above the Nomad.
Battery Life
Several nights per charge. Laser battery lasts ages. Awesome.
Simplicity
It tracks. That’s it. No modes, no half‑speeds, no faff. No
extra switches. Bliss.
Portability
It’s tiny. It’s light. It’s a grab‑and‑go Milky Way machine.
Final Verdict
“Still brilliant - just buy it with eyes wide open”
The Nomad has transformed my Milky Way landscape
photography. I recommend it wholeheartedly - but with a healthy awareness of
the ‘accessory’ ecosystem.
Make sure you have a bigger rucksack than you think – for
all those accessories!
I tried my set up on my smaller, lighter wedge from my star adventurer but went back to my Williams Optics wedge which felt far more stable and secure.
My Full Setup Workflow
Tripod & Mounting first:
Benro
Mach 3 carbon fibre tripod
Circular
rotating Swiss‑arc clamp on top
William
Optics equatorial wedge on the rotating clamp
Nomad
with upgraded Swiss‑arc plate on the wedge
Mounting the wedge on the rotating base means less knob
twiddling when polar aligning.
On the Nomad – secondly:
Alyn
Wallace Z‑plate
Ball
head on that; along with 3D printed longer handles
Laser
pen attached
Setting up Workflow
Set up the tripod ensuring it is level and that you have
feet appropriate to the ground conditions. I weigh mine down with my camera bag
for added stability.
Attach the wedge to the rotational base and roughly align
with Polaris.
Attach the Nomad – I leave it set up with the Z-plate and
ball head left in place – but I always check that all locking nuts and levers
are tight.
Add the camera to the ball head and then rotate the camera
and Z- plate to one side to do the laser polar alignment… Polaris is not the
true centre of rotation… but a laser pen sighted onto it is good enough for
lenses up to around 80mm.
Return the Camera assembly to its home position and then
orientate the camera towards the target.
Other tips – I use a WiFi intervalometer and dummy battery for
my Canon, linked to a power bank.
A critical review of my favourite milky way image from this season
If I was honest – I think this is the best milky way
landscape photo I have ever taken. But, then if I critically review it
carefully – I know there is significant room for improvement.
Ok then - let's get going. As always, if yhou have some tips, thoughts, advice, drop it in a comment box - always appreciated and such sharing helps us all progress further.
Horizon & Edge Alignment
Engine House & Stack Seam: The masking around the stone
engine house and chimney stack is very clean. I can’t see any obvious dark
halos or light bleeding around the tight masonry edges, thus keeping the
structure sharp against the sky.
Ground Horizon Seam: The transition where the rolling
moor/cliff background meets the sky shows a distinct reddish-brown glow. Is
that a good thing? Along the left horizon, the blending is smooth, but the
intense red ambient cast makes the background landform bleed visually into the
lower atmosphere, so obscuring the physical horizon line slightly.
Lighting Consistency
Foreground Lighting: The light painting on the stone wall is
dramatic, emphasizing the rugged texture of the granite. It was what I was
aiming for on the night. However, the warm, intense orange/red cast covers not
just the engine house, but also the ground, the lower sky, and the distant
horizon – so I need to improve my light painting techniques.
Colour Balance: This photo suffers from a heavy global colour
cast. At first I really liked it; now I’m not so sure. The sky transitions from
a strong, saturated reddish-orange glow near the bottom to a deep olive-green
hue at the top (an unintended colour shift from my overly heavy-handed white
balance and/or noise processing). Actions? Lowering the red/orange cast
on the landscape and correcting the greenish tint in the upper sky will make
the scene look much more natural and cohesive.
Storytelling and narrative
Narrative Impact: This is quintessential South West Coast
Path iconography – it was why I wanted to holiday in the area for a few days. I
hope the historic tin mining heritage against the backdrop of space tells a
powerful story of spirited human history beneath timeless skies. I think it
does.
Composition: The framing is visually pleasing. Positioning
the engine house chimney on the left creates a stunning dynamic pairing with
the vertical sweep of the Milky Way on the right. The smaller structure in the
mid-ground gives the scene a great sense of depth and scale, which is what I
was hoping for.
Final Verdict
Compositionally and narratively, I feel this is a strong
image that perfectly captures the history of this part of the south west
coastal footpath. However, the heavy red lighting cast and the green/red
gradient in the sky are its main technical drawbacks and this is where some
people have loved its dramatic tones and moodiness; whilst others have felt it
has failed to capture the night sky and landscape in their true colours on the
night. Thus, it is a misrepresentation. Bringing the colour balance back to
neutral night tones would address this. My problem? I really like the moody
dramatic tones. Beauty is in ‘the eye of the beholder’ after all!
So, if I were to improve this image in affinity photo
v1 – what could I do?
I could neutralize the intense red light cast on the
foreground and fix the green airglow tint in the upper sky by:
1.Removing the Red/Orange Cast from the Engine House: Foreground
Adjustment.
Adding a HSL Adjustment Layer directly above my foreground
layer. Clicking the colour dropdown menu and selecting Reds - dragging the
Saturation slider left (around 30% - 40%) to strip out the oversaturated red
tint, would help. Switching the dropdown to Yellows and dropping saturation
slightly (around 15%) would leave a natural, warm stone texture without the
intense glow.
2.Neutralize the Green Tint in the Upper Atmosphere: Upper
Sky Adjustment.
Adding a Selective Colour Adjustment Layer above the sky
layer and selecting Greens from the dropdown menu - moving the Magenta slider
to the right (+15 to +30%) to counteract the green hue, would help. Similarly, selecting
Yellows and shifting the Cyan slider right (+10%) to cool down the remaining
sickly undertones in dark space would also benefit the image.
3.Harmonize the Sky and Land Colour Temperatures: Global
Colour Balance.
A White Balance Adjustment Layer at the top of my layer
stack - Shifting the Temperature slider toward blue to give the sky deep
night-blue tones. If the foreground becomes too cool, I could invert the White
Balance adjustment mask and paint it onto the sky layer only using a soft,
white Paintbrush Tool (B).
4.Restore Deep Space Blacks with Curves: Contrast
Fine-Tuning.
A Curves Adjustment Layer targeting the sky to pull down the
shadows slightly – will deepen the background sky contrast, push out residual
colour grain and make the stars pop against crisp, dark space.
Verification: Toggle the visibility of the adjustment
layers on and off. The engine house stone should retain warm, lit highlights
without looking neon red, and the space behind the Milky Way should look clean
and dark blue rather than green.
When I have had time to test this work flow proposal – I will
post the re-edited image here and we can decide which one looks best.
As always, if you have any constructive criticism, tips and
advice about the image, drop it in a comment box below so that we can all learn
and benefit from it.
Take care, keep looking up, have fun under the skies
A critique of my 'Mullion quayside cottage under the milky way' image
I am really pleased with this photograph. A great
improvement on my normal milky way landscape efforts. But, in an attempt to be
truly evaluative, I have taken a closer look.
As always, if you have some constructive comments and tips –
then drop them in the comment box below so that we can all learn something new.
Horizon & Edge Alignment
Masking along the roof line of the cottage and night
sky is fairly clean but there is some dark fringing and slight star bleed right
above the chimney and along the right of the building.
Landform maskingis ok, but there is a telltale soft
boundary glow on the far-left cliff edge, where the rocky slope meets the sky.
Culprit? Poor masking during the composite blend.
Lighting Consistency
Foreground Lighting: The stone cottage and grassy bank are brightly lit
with warm, directional light from my off-camera light painting with a head
torch. While this light painting adds pop, the exposure on the front stone wall
is almost ‘too’ bright relative to the night sky, thus making the building look
artificially pasted over a dark backdrop rather than sitting naturally in a
starlit scene.
Colour Balance: The sky features a deep greenish-teal
airglow gradient alongside the magenta galactic core. However, the cottage
lighting is heavily saturated in warm amber/yellow – this creates a stark,
slightly unnatural warm-versus-cool clash.
Potential correction? Softening the light painting exposure
on the stone wall and cooling its white balance slightly would blend the
foreground seamlessly into the night environment.
Storytelling and narrative
I have been really focusing on two elements this year – composition and
narrative story telling within an image. Let’s take a look then at whether I
have made any progress.
Narrative Impact: Featuring an iconic coastal cottage
in this part of the Lizard Peninsula ties directly into the essence of shelter,
heritage, and rest along the south west coastal path trail. Well, I hope so. Composition:The vertical orientation works well I think - the galactic
core erupts directly behind the cottage like chimney smoke, creating a powerful
vertical line that draws the viewer’s eye straight up from the cottage to the
cosmos.
My Final Verdict? I think this is a visually striking composition with great vertical
energy. Tightening the edge mask along the left cliff and softening the
artificial light painting on the cottage stone will turn this image in to a
really good photograph.
So, next steps:
To tone down the harsh bright light painting on the cottage
front and to blend it naturally into the night sky using Affinity Photo
1, I could:
1.Target the Foreground Layer:In the Layers
Panel, select the foreground image layer containing the illuminated stone
cottage. Blend Colour Temperature with White Balance by adding a White
Balance Adjustment Layer directly above the foreground layer and clip
it (drag it onto the foreground layer thumbnail). Shift the Temperature slider
toward blue (cooler) and slightly adjust Tint toward
green/magenta until the artificial amber light on the stone matches the
surrounding ambient night light.
2. Pull Back Highlights with Curves:so, someExposure
Control. Add a Curves Adjustment Layer clipped to the
foreground. Click the top-right node of the curve (the highlights) and drag it
downward to lower the harsh intensity of the lit stone wall. Add a node in the
centre to pull the midtones down slightly, ensuring the building sits naturally
in shadow without looking washed out.
3.Apply a Vignette & Edge Shadow:Final Polish by
adding a new Pixel Layer set to Multiply blend
mode at 40–50% opacity. Select a large, ultra-soft Paintbrush Tool (B) with
dark blue/black ink at 10% opacity, and gently brush around the outer base and
roof edges of the cottage to roll off the light painting naturally into the
surrounding darkness.
Verification: If I hide and reveal my adjustment
layers to confirm that the cottage maintains its detail while looking lit by
gentle starlight and ambient glow rather than a bright flashlight – I can
evaluate how well these planned adjustments might look.
There are other things I could so, although I haven’t quite
yet worked out the workflow order yet:
To create a sharp, clean mask along a rigid structure like a
stone roofline in Affinity Photo 1 without leaving dark halos
or soft bleeding:
1.Outline the Roofline with the Pen Tool: Selection. Select
the Pen Tool (P) set to Mode: Path in the top
context toolbar. Zoom in closely (200%) and click along the roofline, chimney,
and edges to trace the structure precisely. Placing points slightly inside the
outer edge of the roof prevents catching sky pixels.
2.Convert the Path to a Selection:Conversion.
With my vector path complete, click the Selection button
in the top context toolbar to convert the vector outline into a "marching
ants" active selection.
3.Apply Subtle Edge Feathering:Refinement.
Go to Select > Refine Edges. Set Feather to
a tiny value (0.5 - 1.0 px) to prevent the cut from looking like a harsh vector
cutout. Leave Smooth and Ramp at 0 to
avoid softening the straight edges of the roof. Click Apply and see
what happens.
4.Generate the Layer Mask:Masking.
With the cottage layer selected in the Layers Panel,
click the Mask Layer icon at the bottom of the panel. This
automatically clips the sky out along my trace.
Verification: Zoom to 100% along the
roofline and chimney. Toggle the sky layer on and off to confirm there are no
dark fringe outlines, bright halos, or missing stone textures.
On looking closely at this image again – I suddenly spotted some
high ISO sensor noise and some ‘grain’ in the sky layer. So this needs
resolving. A possible work flow is:
1.Duplicate & Target the Sky Layer:Isolation.
In the Layers Panel, select my sky layer to
duplicate it. Name this new layer "Sky Denoise". This keeps my edits
non-destructive.
2.Remove Colour
Speckles (Denoise Live Filter):Colour Noise.
Go to Layer > New Live Filter Layer > Noise
> Denoise... Drag the live filter layer so it sits inside my
"Sky Denoise" layer. In the Denoise dialog, set Extreme to
off, and increase Chrominance slider. This should clear out
ugly red, green, and blue colour speckles from dark space without softening
star details.
3.Smooth
Luminance Noise: Luminance
Grain.
In the same Denoise dialog, I could slowly raise the Luminance slider
and keep Luminance Detail around 50% to ensure fine stars
don't get erased or smudged into blobs.
4.Protect Sharp Stars with Frequency Separation:Star
Preservation.
If fine stars still lose sharp contrast – that is a
potential issue - Filters > Frequency Separation... setting the
radius to 2 – should help. Apply noise reduction only to
the High Frequency or Low Frequency layer as needed (I am still learning what
these layers are), or invert my Denoise mask and paint noise reduction onto the
black space between stars using a soft brush. Again, this is new learning for
me.
Verification:Zoom to 100% on a dark patch
of space away from the Milky Way core. Toggle the Denoise filter on and off to
verify that colour grain disappears while the smallest stars remain crisp
pinpoint dots.
As always, I will put the new image here and we will be able
to do a direct comparison to see whether my proposed work flow above has
worked.