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Old Feb 2, 2003, 11:44 AM   #1
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Default D100 Newbie Q#1 - CSM Noise Reduction

Ok, after doing a lot of research and reading reviews and looking at pic quality, I made the move to a D100. I had a 950 before and was happy with it, so Nikon was a natural choice.

But the controls on this camera are astounding.. I am still working my way through the users manual to figure it all out! Naturally, I have a few questions, so I will asking for your advice.

Q#1 - I was playing with the various custom settings when I read that CSM4 can be used to reduce noise at shutter speeds of less than 1/2 sec. So, I figured, why not set it on? (assuming it would not be on at speeds above 1/2 sec). It was not until a while later, that I noticed that the camera buffer was always at r03 instead of r06 - regardless of what speed the shutter was at! I sort of figured this 'feature' would only kick in at speeds below 1/2 sec like the manual stated. Now, I am not sure if it is always on or not, but why the heck is my buffer reduced if indeed it is not being used at speeds above 1/2 sec?
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Old Feb 3, 2003, 11:17 AM   #2
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The NR (Noise Reduction) feature works by (I think I've got this right) taking 2 images. One correctly exposed, and one dark. It superimposes the black over the correctly exposed image to eliminate the noise that shows up in exposures longer than 1/2 sec. It will still do the same thing on faster exposures but with little or no effect to the image, but it still eats buffer and slows transfer times to the CF.

I do not turn on the NR feature unless I need it. I also use the Anti-Vibration feature with it as well on long exposures. I have used this comination of features many times with great success. Just remember to turn them off when you are done.
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Old Feb 3, 2003, 11:24 AM   #3
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Joe.. thanks for the reply. Yes, I understand how it works, my confusion was that it was supposed to only work at speeds less than 1/2 sec.. so I was hoping to simply leave it on and not have it take effect until the camera was shooting at those low speeds. I did not think the camera would 'reserve' the buffer space when it was not actually being used. But I guess that is not how it works.

Thanks for your reply.
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