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07-16-2011, 06:02 AM   #1
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K-5 and Sigma 10-20mm with NDx400

I discovered this problem yesterday.
When shooting with Sigma 10-20mm and Hoya NDx400 I get randomly these weird banding issues.
I have tried to reproduce this issue with and without filter couple of times but haven't yet managed to do so.

Now I'm wondering that are those bandings caused by the ND filter or the K-5 itself.

Has anyone ever encountered this before?

Settings in the photo below were ISO 80, f/7.1, 30sec @ 11mm.


07-16-2011, 06:36 AM   #2
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I took a similar shot to yours using an ND4 at ISO80 F32 with my Sigma 10-20 set to 16mm. No Banding issues at all. My only problem was a drop of water on the lens that I didn't see until I got home.
07-16-2011, 07:15 AM   #3
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Well this doesn't happen every time.
Most of the photos come out without this issue.
07-16-2011, 08:02 AM - 1 Like   #4
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looks very much like light coming in through the viewfinder. Test it by placing the uncovered viewfinder towards the sun and taking a similar picture, then cover the viewfinder and try it again.

07-16-2011, 08:23 AM   #5
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QuoteOriginally posted by enoeske Quote
looks very much like light coming in through the viewfinder. Test it by placing the uncovered viewfinder towards the sun and taking a similar picture, then cover the viewfinder and try it again.
Ahh, I should have thought that
Just tested as you suggested and you were right. I have never taken long exposures in the daylight so this is kinda new to me.
Thanks!
07-16-2011, 03:33 PM   #6
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Excellent point Enoeske. I never thought about it until you mentioned this and I then took a look at Nitrok's exposure at 30s. That can certainly make the difference.
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