Linked Questions

2 votes
2 answers
11k 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 ...
Moon's user avatar
  • 145
-1 votes
1 answer
1k views

why do I have red dots all over the foreground of my stars long exposure shot [duplicate]

I have a 60D and have never had this problem before although I have never set the exposure for 30 minutes I am so disappointed its a great shot
K. Johnston 's user avatar
1 vote
1 answer
827 views

When zoomed in, I see red, blue and white pixels. What is the cause of this? [duplicate]

I was experimenting with the bulb mode of my Canon EOS 600D camera. I realised, in the image there were these red, blue and white pixels that are also seen in the screenshot. What is the reason that I ...
alpt's user avatar
  • 11
9 votes
3 answers
7k views

Hot, stuck, or dead pixels. What's the difference?

What is the difference between hot, stuck, and dead pixels with regards to a camera's image sensor? What can cause each to occur? What can be done to reduce their influence on a photo?
Michael C's user avatar
  • 175k
0 votes
3 answers
976 views

Why are my product photographs not sharp?

I just bought a Canon 750D. The picture has too much noise. The detail/shine of the diamond is not really showing. I am also using a tripod and timer. The lens is the EF-S 18-55mm ƒ/3.5-5.6 IS STM. ...
Margz's user avatar
  • 45
0 votes
2 answers
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 ...
Suresh Karia's user avatar
1 vote
2 answers
3k views

Why my dslr takes more time to process pictures shot at high apertures?

Using the same setting, my 600d takes about 10 secs from flash to preview picture if I shoot with a high aperture of f/22. But if I shoot with the same settings at f/3.5, I can see the picture preview ...
Bar Akiva's user avatar
  • 217
1 vote
4 answers
2k views

How can I fix this stuck pixel on an image taken using Nikon z6?

Settings of the image: ISO 320 f/8 15s at 70mm. Shot RAW Large. Nikon z6. The image below is zoomed in to show the stuck pixel. I noticed this blue dot and found out it is known as a stuck pixel. ...
Mohammed Al Rashid's user avatar
2 votes
3 answers
635 views

Slow shutter speed and image sharpness

I'm new to photography, I hope I won't misuse any terms here. Let say I shoot a still subject like a product on a tripod with controlled lighting. Let say I have little light and so I use a slow ...
Francois's user avatar
  • 123
2 votes
3 answers
538 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 ...
BustedSanta's user avatar
2 votes
3 answers
1k views

How do I prevent and/or remove hot pixels in my shots?

I am getting some noise in my shots on the black. I wondered if this can be something i can prevent or do I need to clean the image sensor? I am using a Canon T3i/600d/Kiss X5. The shot was done at ...
james man's user avatar
3 votes
1 answer
374 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 ...
Tinker's user avatar
  • 353
2 votes
1 answer
445 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 ...
dmkonlinux's user avatar
  • 1,013
2 votes
1 answer
396 views

Suddenly have many stuck pixels on my DSLR - is there a reason for it/is it saveable?

I've got a Canon 1100D camera which is maybe getting on a bit at about 12 years old, but it's performed great up to now. I took it out recently though to do some long exposure night shots, and noticed ...
el_zilcho's user avatar