Cokin Z-pro holder, wide angle lens and dark corners


posted on 16th of july, 2011

About a month or two ago I posted a question into DT's forum about ND Graduated filters, Cokin Z-pro holder, wide angle lens 17mm at 1.6x crop sensor and vignetting / dark corners. Didn't receive an answer if there will be any dark corners or not.

To date I've had that set for a while and I thought I post an answer for my own question. So, the quick answer would be Yes, there will be dark corners with that set up!. I've tried several holder set ups by adjusting filter holders moving them from the front to back. No good result. Then I replaced the adapter ring so that the holder would move a little more backwards. Still no good result. Even, if trying without any filters, I still get minor dark corners at 17mm @ 1.6x crop sensor (approx. 27.2mm@35mm equiv.). So, to sum up, the only way to get rid of vignetting is to use not very long shutter speed and hold the filter in hands in front of the lens. But when long exposure is wanted, a little zooming is necessary, or cloning in photoshop ;)

So, based on my experiences, even more wider filters and holders than Cokin z-pro and 100mm wide filters for 27.2mm wide lens is needed.

Comments (5)

Posted by Risto40 on July 20, 2011
I was looking for Lee filters and its holder for wide angle lens as well but those are not sold in my country and in internet stores like amazon and ebay I didn't have any luck either. Some US based photo equipment stores allowed to order larger filters (no idea about an holder) but items would have shipped after 6-10 weeks. Too long period for me. So i went for 100mm wide filters and z-pro holder. Once i get rich (by playing lottery :) i'll buy another set of filters and an holder suitable for very wide angle (as you know good filters are not cheap).
Posted by Afagundes on July 19, 2011
I am using Lee filters with the holder suitable for wide angles and had no vignette on my 5D with a 17-40
Posted by Risto40 on July 18, 2011
I always use lens correction in ACR. At minor vignetting it helps, but using the holder, vignetting is sharp and strong (complete black) so it won't help.
Posted by Leswag on July 18, 2011
Try Lens correction / Lens Vignette tool in Photoshop Camera Raw, Icon six from the left should do the trick, for whatever reason few people know about it, will do the trick....
Posted by Halient on July 17, 2011
In my experience the cokin nd system is a pain due to the mounting system, Just get a decent set of Hoya or atleast a midrange brand of standard nd filters



Comments (5)

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Photo credits: Risto Hunt.
 
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