Tagged Questions
6
votes
2answers
470 views
Where does the noise come from in a long exposure?
I created another test. This time I exposed for 36 minutes, because I wanted to test star photography. This is not meant to be a nice photo; I really just tested.
Camera was inside the house behind ...
2
votes
3answers
401 views
Why is dark-frame subtraction on my Pentax camera shorter than the exposure time?
When my Pentax K-r applies long exposure noise reduction (dark-frame subtraction), the processing time required for this operation is less than the exposure time. For example, my camera may perform ...
10
votes
5answers
3k 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 ...
