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I need help. ND400 long exposure

TakeTwo

South Lake Tahoe, US
214 posts

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TakeTwo Silver Member Nikonian since 26th Jul 2009
Fri 29-Apr-11 05:18 AM

Hello group. I have a question for all of you and am hoping someone can help to explain my problem. I took several pictures today using my new nd400 filter so I could start capturing some daytime long exposure of the lake. In the posted image below I took with a 15 second exposure by stacking a nd-400 and nd8 (12stops total)filters. My problem is I had over 400 hundred hot or white pixels as I would say. I did not use any noise reduction. Am I asking to much for the camera's sensor.

Its seems to me that all those that say putting a lens cap on your lens and take pictures to find hot or dead pixels may want reconsider that. Is taking a picture with a 12 stop filter in some way making the camera's sensor work harder for light.

I'm at a loss here. I have never had any issues with my sensor? I think noise reduction on is a must. Has anyone shot a similar technique while using noise reduction and had or not had hot pixels.


d7k
12-24mm
exp. 15"
ISO 100
f:22
I cloned out the hot pixels in this image.

Click on image to view larger version


This is a 100% crop of the sky of a different image. No post work.
Click on image to view larger version


Attachment#1 (jpg file)
Attachment#2 (jpg file)

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