Do you know why this problem happen ?

Started Feb 18, 2004 | Discussions thread
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tommyrazz New Member • Posts: 11
Do you know why this problem happen ?

Yestarday I posted a new thread about a blue halation in my shots.
This occurs when I use a long time and a very close diaphgram
( 1/2s)
You can see this halation

http://www.pbase.com/image/26161901

I think that it's due to the zoom Sigma EX 17-35 ... because with the 28-70 2.8 EX Sigma it does not occur...

Any suggest will be appreciated.
ciao !
Tommy.

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