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1answer
147 views

Why are my stacked RAW images overexposed in DeepSkyStacker?

When I use Deepskystacker for stacking about 40 pictures (RAW) of a Galaxy (underexposed), I always get overexposed tif results. When I stack these pictures in Photoshop and use smart objects and ...
1
vote
1answer
78 views

Exposure in Astrophotography [closed]

So, when taking a photo of the stars, I've generally taken photos at about ISO 3200, 20 seconds, f/3.5. I subsequently stack about 5 of them to get rid of the noise, which seems to work relatively ...
4
votes
4answers
2k views

Multiple copies of the same exposure, but randomizing the noise?

As a budding astrophotographer, I find my results are still largely hit or miss. Sometimes the standard procedure of stacking multiple exposures to randomize the noise and boost the signal works ...
1
vote
1answer
211 views

Why is DeepSkyStacker output resolution off?

I am using DeepSkyStacker version 3.3.2 to stack 20 light frames of some stars. The registration and stacking goes off without a hitch, but the resulting image resolution has drastically changed. The ...
3
votes
4answers
1k views

How can I avoid star trails? [duplicate]

When shooting deep sky objects such as Andromeda or the Orion nebula, I find that I'm between a rock and a hard place. I can get passable results by running 3600 ISO and four second exposure. Any ...
5
votes
3answers
9k views

Are there image stacking (astrophotography) options on MacOS that don't involve running a Windows VM?

I am starting in astrophotography. I want to create a "non star trail/track" result similar to what you would get with software like Deep Star Stacker in Windows, but I use MacOS. Do I have any ...
0
votes
3answers
791 views

Image Stacking for noise reduction using MATLAB [closed]

I'm new to Image processing and started using MATLAB for Astrophotography processing. I'm trying to process 10 corrupted images (Same Image but mixed with different noise) of Planet Saturn using ...
0
votes
2answers
669 views

How to know the resulting iso of stacked images?

I've read in several questions like this one that stacking photos helps to reduce the noise of the resulting image, which is really helpful in astrophotography. My question is if I can know a priori ...
6
votes
2answers
822 views

Why does DeepSkyStacker output a “glitch” image with just vertical lines

Yesterday I've got my new tracker (iOptron SkyTracker), and took about 30 shots of the Orion Nebula (with my Canon EOS 6D and 70-200mm f/2.8 lens at 200mm, f/4, 6s exposure of each frame) and got home....
1
vote
1answer
815 views

Photoshop stuck at Align Selected Layers Based On Content

I am trying to align a group of astro stacks (about 100 shots, masked) and Photoshop is stuck at: The progress bar did move to this point in less than a minute, and has been stuck at this exact point ...
4
votes
1answer
915 views

Why does DeepSkyStacker brighten the stars too much compared to Photoshop?

I've got a 100-ish image stack of the milky way. I always use Photoshop's stacking but sometimes it fails aligning the images or it requires too much swap space (~80GB range) on my primary drive which ...
1
vote
2answers
4k views

How to Record Videos at Full Resolution with Nikon D750 for Astrophotography? [closed]

I am using Nikon D750 and I want to use it to record videos of planets/moon, so that I can later stack them into images. However, the camera wastes its potential by down-sampling the video recording ...
1
vote
1answer
246 views

If i use ISO 1600 to photograph stars will image stacking help reduce noise but also add more detail?

I would like to take better photos of the stars, especially the milky way, but my highest ISO setting is 1600. I have now learnt that image stacking can help reduce noise when taken with the same ...
1
vote
1answer
582 views

When stacking images to remove noise in astrophotography, should the exposure be the same in each?

I am trying to get to grips with astrophotography and have read about image stacking to help reduce noise. I am a little confused about whether the images to be stacked are all taken at the same ...
2
votes
1answer
917 views

What's an easy way to de-rotate astronomical images taken without an equatorial mount?

I don't have an equatorial mount nor I plan to buy one. However, I would like to stack my night sky photos. Is there a software that can easily de-rotate my images so I can stack them? By easily I ...
8
votes
1answer
2k views

Stack of 4 seconds exposure photos of Milky Way, how is it done?

I'm looking at this photo in http://www.astrobin.com/17455/ In the description the author specifies: 100 x 4 second exposures at f5 and ISO12800, Canon 5DmkIII + 24-105f4L@105mm No tracking, just on ...
8
votes
5answers
13k views

Linux software for stacking and RAW processing

I'm starting with astrophotography and my DSLR produces CR2 raw images. I use Linux and want to stack series of shots and do RAW processing (curves, RGB balance, etc.) I googled and found software ...
34
votes
4answers
17k views

Why am I unable to capture as many stars as I can see with my eyes with my new DSLR?

I have recently been given a Nikon D7000 as a gift. I have been trying to take pictures of stars on very clear nights. However, I am unable to make the camera capture many of the stars. My eyes seem ...
16
votes
3answers
2k views

What causes and how can I avoid this moiré pattern in a composite night sky photograph?

I'm new to taking star trails, and fairly new to photography in general. After my first attempt at taking a star trail, I composited them in Photoshop and when I merged the layers I got this pattern ...
4
votes
4answers
7k views

Stack star photos without trails but WITH sharp foreground?

I have a Nikon D5100 and a Tokina 11-16mm f/2.8 I want to stack multiple star pictures while also keeping some interesting foreground for context. I don't want star trails though. I understand that ...
8
votes
5answers
3k views

Deep Sky Photography with telescope without Tracking

I tried photographing moon and Saturn with a 8'' Dobsonian (without tracking). And it was a breeze. But I had to follow the '600 rule', i.e I only exposed it for less than (600/f) sec ~ 1/2 sec. But ...
3
votes
5answers
14k views

Can I get longer than 15 second exposure with my canon SX 50?

I am new to photography and I was hoping to go take some pictures of star trails this weekend. I just bought this camera this week and I realized that the highest shutter speed is 15 seconds. Is there ...
16
votes
1answer
997 views

What is image stacking as it relates to astrophotography?

What is 'image stacking' and how can I apply it to my astrophotography to create better looking photographs? Are there any 'must have' resources for learning how to image stack for the purposes of ...
8
votes
3answers
12k views

Best opensource/ free stacking software for mac for astrophotography

I am using snow leopard and mainly want it to automate the stacking as much as possible. I have seen that PixInSight looks pretty awesome, but that's not free, in-fact far from it, so I want something ...
16
votes
4answers
7k views

How can I simulate a long exposure photo using a set of shorter exposure photos?

I'm shooting towards the sky to capture the stars. The exposure time is 15 seconds, so I can see the stars still, without a trace. These photos are taken continuously one after the other, because I ...