Linked Questions

33
votes
3answers
15k views

Why does storing a long exposure photo take almost as long as the exposure time itself?

Last night I took some night sky shots, and I've noticed that with long exposure times (15s, 30s) the time it took to store the images in the camera memory card (jpeg) took roughly as long? The ...
16
votes
5answers
14k views

Does “long exposure noise reduction” option make any difference when shooting RAW?

I can configure my camera (5D) to use long exposure noise reduction (dark frame is exposed and subtracted), but is this method really effective when shooting RAW? Or is the actual subtraction only ...
2
votes
2answers
10k views

How to prevent hot pixels? [duplicate]

I've just returned from a trip. One of the locations was very dark site. I took a photo with 4 minutes exposure for the foreground. The photo came out unusable. There are so many red, green, and ...
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 ...
0
votes
2answers
1k views

Astrophotography exposure setting for noise reduction

I was on a hiking for a week into the dense forest of Western Ghats with my Sony slt a58. I am into Astrophotography. The place was absolute black with millions of stars. The perfect place for ...
0
votes
3answers
1k views

How to choose the correct white balance for star trail photography (Nikon D3200)

These last days I've been practising star trails photography. It's not complicated, but there's a problem that keeps me giving headaches: the white balance. I know, for this type of situations, I ...
2
votes
3answers
501 views

What should I look for in a camera for shooting in bulb mode for astrophotography?

I am interested in astrophography and I would like to learn and experiment with long exposure. I have been looking around for some dslr cameras but I can't find much information about bulb mode for ...
0
votes
2answers
808 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 ...
2
votes
1answer
379 views

How does in camera dark frame noise reduction work?

There are several questions and a tag relating to what it is but I can't find much relating to how it is actually done in camera anywhere. The internet reveals many "how to" pages for doing the ...
2
votes
1answer
170 views

Dark Frames for Long Exposure on a tracker?

I have come across the concept of dark and bias frames for astrophotography recently. Usually, I exposes my shot for 15+ minutes on a star tracker at ISO=320. I take around 5-8 shots a night and I ...
1
vote
2answers
90 views

Time difference between Auto Mode and Other modes

I'm a super newbie to photography. I would like some clarification on the following: I am shooting an image in Auto mode. There is no shutter lag at all and the picture looks good. The settings are: ...