Night scenes shooting tips and hot pixels
I am a newbie to digital SLR(D100). I shot some night scenes tonight, with shutter speed at around 30s, and the pictures turned out to be very noisy(so many hot pixels). I then tried 10s, still have many hot pixels. at 5 seconds, it starts getting better. I didn't want to use NR just to keep details. I just wondering how you guys shooting night scenes with long exposure w/o NR? Do you guys have many hot pixels at 10s shutter speed?
#1. "RE: Night scenes shooting tips and hot pixels" | In response to Reply # 0bill_staples Registered since 23rd Dec 2002Fri 31-Oct-03 04:57 AM
I'm not sure what you mean by "I didn't want to use NR just to keep details". To my knowledge NR does not affect photo quality at all, but it does eliminate noise from long exposures. From the manual: "At shutter speeds slower than about 1/2 s, “noise” in the form of randomly-spaced, brightly-colored pixels may appear in photographs, particularly in shadows. Custom Setting 4 can be used to reduce noise at slow shutter speeds."
I've used it for 10s exposures, and get no noise, and clear, sharp details. good luck -
#2. "RE: Night scenes shooting tips and hot pixels" | In response to Reply # 1mfrissen Basic MemberFri 31-Oct-03 11:30 AM
indeed, NR doesn't really affect image detail, since it is only mapping out random pixels. I've shot up to 5 minute exposures, and NR works really well, although not always very predictable (depending on sensor temperature)..
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#4. "RE: Night scenes shooting tips and hot pixels" | In response to Reply # 0
I've done quite a few night scenes and always use noise reduction.
When you turn it on, it only is engaged for long exposures. It basically does another exposure without opening the shutter. This allows the camera to map out noise and hot pixels by comparing the two exposures. It will take double the time for the exposure, but I feel it is well worth it. I don't notice any degradation in details.
I think you should definitely give it a try and judge the results for yourself.
This is a picture I took at 0.77 seconds at f/8 that was taken with noise reduction on.
Attachment#1 (jpg file)
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