AkastroidAstrophotography guides
What the jargon means, why the steps exist, and how to get a better image out of the gear you already own.
AutoStakkert for Mac: There Isn't One. What Planetary Imagers Use Instead
AutoStakkert is Windows-only. What stacks planetary SER and AVI video natively on a Mac in 2026 (Lynkeos, PSS, Siril, Akastroid) and what each one costs you.
Read the guide →Drizzle and Undersampling: When It Helps and When It Wastes Your Night
Drizzle recovers real resolution from undersampled data and does nothing for the oversampled kind. How to tell which you have before turning it on.
Read the guide →PixInsight vs Siril: Which Should You Learn?
Both process the same data to a high standard. The real differences are cost, how long each takes to learn, and how far each goes in expert hands.
Read the guide →Star Reduction and Starless Processing: What It Is For
Separating stars from nebulosity lets you stretch each on its own terms. Why a rich star field fights your target, when to reduce and when to leave well alone.
Read the guide →Adding Hα to RGB: Natural Color With a Deeper Nebula
Hα frames can deepen a true-color image without turning it into false color.
Read the guide →The Hubble Palette: Why SHO Starts Green and Ends Gold
Combine SII, Hα and OIII as red, green and blue and the result is green. That is correct, and it is only the first step.
Read the guide →Linear vs Stretched: Why Your Stacked File Looks Black or Green
A stacked astrophoto opened in an ordinary viewer is black or green.
Read the guide →Processing the North America Nebula (NGC 7000)
NGC 7000 fills the frame, so every step that assumes a dark sky goes wrong on it.
Read the guide →Why Are My Stars Yellow or Green in an RGB Composite?
Faint stars tinted yellow-green while bright ones look fine is a processing fault, not your stars.
Read the guide →Dithering: The Free Fix for the Noise You Cannot Stretch Out
Diagonal streaks that get worse the more frames you add. Where walking noise comes from, why calibration will not remove it, and the setting that stops it.
Read the guide →Astrophotography Software for Mac: What Runs, and What Doesn't
DeepSkyStacker, AutoStakkert and RegiStax are Windows-only. What runs on a Mac in 2026, native on Apple Silicon, for deep sky, planets and the Moon.
Read the guide →The Best Dark Sky Sites in Australia for Astrophotography
Australia has some of the darkest accessible skies on Earth and the southern sky's best targets overhead.
Read the guide →DeepSkyStacker for Mac: There Isn't One. Here Is What to Use Instead
DeepSkyStacker is Windows-only and always has been. The macOS alternatives, what each costs you in learning time, and why emulation disappoints.
Read the guide →Processing Smart Telescope Images: Seestar, Dwarf and Vespera
Smart telescopes stack for you, so why process at all? What the built-in stack leaves out, how to get the raw frames off the telescope, and what to do with them.
Read the guide →Narrowband Filters: What SHO and HOO Mean
Dual-band, tri-band, 7nm versus 3nm, and why the Hubble palette makes hydrogen green. The decisions behind a narrowband image, in order.
Read the guide →Photographing the Sun: The Safety Rules, Then the Technique
The only target that can blind you and destroy your camera in the same second. What makes a solar filter safe, and how white light and Ha differ.
Read the guide →Your First DSLR Stack: From a Folder of Raw Files to a Picture
What to put in which folder, what the software detects on its own, and what two real sessions (111 Pleiades frames and 134 of Orion) reported at each step.
Read the guide →How Many Frames Should a Planetary Stack Keep?
The 'best 25%' rule is a habit, not a measurement. Two real captures, stacked at several fractions, show when it helps and when it costs you sharpness.
Read the guide →PIPP, AutoStakkert and RegiStax in One Window
PIPP, AutoStakkert and RegiStax are three Windows apps and two intermediate files. One app that does all three on Mac, Windows and Linux, and where it falls short.
Read the guide →Planetary Sharpening: The Wavelet Sliders, Dispersion, and Why 4× Looks Worse
What each of the six RegiStax-style layers lifts, what dispersion correction fixes, and why pushing the fine sliders to the stop makes a good stack worse.
Read the guide →Why Are My Stars Purple, Red or Magenta?
Three different faults look alike from a distance. How to tell a wrong white point from a lens fringe from a clipped core, and what fixes each one.
Read the guide →What the Processing Log Is Telling You
Sigma clipping, linear-fit clipping, 'drizzle declined', 'frames protected': every line of Akastroid's processing log in plain words, and which ones matter.
Read the guide →Why Is My Stacked Image Green?
A raw stack from a color camera is green, and it is supposed to be.
Read the guide →Your First Milky Way Photo Without a Star Tracker
A camera, a wide lens and a tripod is enough. The 500 rule will let you down on a modern sensor; what to use instead, and how a landscape differs.
Read the guide →Can You Process Astrophotos Online, Without a Computer? (2026)
What exists for stacking astrophotography in the cloud, from a phone or tablet, for Seestar, Dwarf and Vespera owners who never bought a PC for this.
Read the guide →What Can You Photograph From a Bortle 7 Sky?
More than the internet suggests, less than the marketing does. A realistic target list by sky brightness, and what barely cares about light pollution.
Read the guide →The Best Dark Sky Sites in Germany for Astrophotography
From a reserve within reach of six million Berliners to a national park near Cologne, here is where Germany's certified dark skies are.
Read the guide →The Best Dark Sky Sites in the UK for Astrophotography
Britain's light pollution makes a properly dark site worth the drive.
Read the guide →The Best Dark Sky Sites in the US for Astrophotography
Where to point a telescope in the United States: certified dark sky parks, the star parties built around them, and what each one is good for.
Read the guide →Processing the Andromeda Galaxy: Why the Core Isn't the Problem
Most galaxy processing advice is really nebula advice. Andromeda's real difficulty is recovering a disk so faint it barely clears the sky background.
Read the guide →Processing Moon Photos: The Color Almost Everyone Leaves Out
The Moon is not gray. Its maria are tinted orange-brown by iron oxide and blue by titanium. The color is real, too subtle to see by eye, and easy to process away.
Read the guide →Processing the Orion Nebula: Taming Its Blown-Out Core
M42's core is roughly fifty times brighter than its outer wisps, which is why one stretch ruins the other. How to fix it, start to finish.
Read the guide →Photographing the Moon and Planets: Why Video Beats a Photograph
A single shot of Jupiter will always look soft, and it is not your telescope's fault. Lucky imaging keeps the few frames the atmosphere left alone.
Read the guide →Astrophotography Software for Beginners: What to Start With
Most beginners pick the software experienced imagers recommend, spend three months not getting an image, and quit. Here is what each program asks of you.
Read the guide →I Bought a Telescope and I Have No Idea What I'm Doing
The equipment is the easy purchase. Then the photograph needs six programs and a fortnight of tutorials. What the workflow is, and how much you can skip.
Read the guide →Why Does My Astrophoto Look Bad? A Symptom-by-Symptom Guide
Work backwards from what you can see to what caused it. Soft stars, elongated stars, a green sky, walking noise: each has a few measurable causes.
Read the guide →Do You Need to Understand Processing to Do Astrophotography?
The answer is no, and it used to be yes. Which parts of the workflow are real decisions, which are just measurements, and how much you can skip.
Read the guide →Elongated Stars: Is It Your Tracking, or Your Optics?
The same symptom, two causes, and fixes that cost very different amounts. A clean test separates them, and it takes one look at three frames.
Read the guide →How to Process Astrophotos Without Learning PixInsight
PixInsight takes months and it is not the only route to a finished image. What the steps are, which you can have done for you, and where it still wins.
Read the guide →Which Frames Should You Throw Away? Reading a Quality Score
Culling subs by eye is slow and unreliable. What gets measured on a frame, what each number means, and why a score is relative to the session.
Read the guide →How Long Should Your Sub-Exposures Be?
The answer depends on your sky, not your camera. The measurement that settles it in one night, and why going as long as possible is wrong under light pollution.
Read the guide →PixInsight vs Siril vs AutoStakkert vs DeepSkyStacker: Cost and Learning Time (2026)
A comparison of PixInsight, Siril, AutoStakkert, DeepSkyStacker, GraXpert and Akastroid: what each is best at, and what each one costs.
Read the guide →Shooting a Mosaic: When One Frame Is Not Wide Enough
The Veil, the Rosette and most Milky Way nebulae are larger than the field a fast scope gives you. How to plan panels, and what stitching cannot fix.
Read the guide →Why Are My Stars Trailing? Diagnose It From the Shape
Trailed stars have six common causes and the fixes have nothing to do with each other. The direction and position of the streaks tells you which one you have.
Read the guide →Deconvolution Explained: Recovering Detail the Atmosphere Blurred
What deconvolution does, why it's the biggest quality lever in deep-sky processing, and the three cases where running it makes your image worse.
Read the guide →Removing Light Pollution Gradients Without Eating Your Target
Background extraction is the step most likely to damage an image while appearing to improve it. What goes wrong, and the one rule that prevents it.
Read the guide →How Many Frames Do You Need? A Straight Answer
The arithmetic behind stacking: why 200 frames is not twice as good as 100, when adding time stops helping, and how to tell which limit you have hit.
Read the guide →What Akastroid Replaces, and What It Doesn't
A straight comparison against PixInsight, Siril, PIPP, AutoStakkert and RegiStax: what you save, and the cases where you still want the other tools.
Read the guide →Your First Image in Akastroid: A Complete Walkthrough
From a folder of frames to a finished photograph, with an explanation of what happens at every stage and which of the automatic decisions are worth overriding.
Read the guide →Why Your Nebula Came Out Red, Brown or Washed Out
A red-brown cast across the frame is one of the most common results in amateur astrophotography, and it is almost always the same three causes.
Read the guide →How Stacking Works (And Why More Frames Isn't Always Better)
What stacking does to an astrophoto, why it is not averaging pictures together, how many frames are enough, and why more frames eventually stop helping.
Read the guide →Seestar FITS Files: How to Process Them on a Computer
How to move stacked FITS and subs off a Seestar S30 or S50 to a Mac or PC, what is in the files, and how to get more out of them than the live stack shows.
Read the guide →Darks, Flats and Bias Frames: What They Fix
A plain explanation of calibration frames: what each one removes, how many you need, and when shooting them is a waste of a clear night.
Read the guide →Nothing matches that. Try a broader word, or.