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07-21-2009, 05:42 PM   #1
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SelrahCharleS's Avatar

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K-7 long exposures without DFS

I hope this isn't a bother, but I was curious about how bad the noise is on the K-7 with the Dark Frame Subtraction Noise Reduction turned off on exposures of ten seconds or more. Would someone be kind enough to upload either a full size sample or some 100% crops of a 10 second exposure without long exposure NR? Thank you.

Also, I remember reading that dark frame subtraction kicks in automatically on exposures longer than 30 seconds, is this correct?

07-22-2009, 04:01 AM   #2
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DFS is forced on Bulb mode only.
On other modes it can be switched off.

Im thinking how not to use it on DFS. There is one solution - for example You need 2 minutes exposure without DFS. So set manual mode M and multiple exposure of 4 frames, each 30 seconds.
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