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08-25-2010, 07:34 AM   #1
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DA 15mm LTD and GND Filters

Hi

Has anyone found a way to use a GND filter on the DA 15 Ltd without vignetting ?

I was told by another member that the adapter ring on the extra wide Cokin P series causes vignetting.

Does the Cokin Z Pro have the same problem.

Any help or suggestions appreciated.

PS: I did try a search but didn't come up with a definitive answer.

08-25-2010, 07:48 AM   #2
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I was able to use my cokin system with the 15. I'll confirm the size etc., later this evening.
08-25-2010, 11:43 AM   #3
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I red some talk on dpreview forum about that in the past I did it. square filter holder on beloved 15 limited.: Pentax SLR Talk Forum: Digital Photography Review. But I am sure there will be more try a search
08-26-2010, 02:35 AM   #4
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Original Poster
Thanks pcarfan.

And thank you luck1 for the link. It led me to another poster who seems to have a solution.

I know there is a tidy workaround, just got to find it.

Cheers

08-26-2010, 07:57 PM   #5
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I have used the Cokin P series 49mm adapter, along with a 49mm slim profile C-PL filter and don't remember seeing any vignetting with the DA15. I used the polarising filter as a spacer in order to fit the Cokin filter holder over the built in lens hood.
I have however only tried this once or twice, as I didn't like using the Cokin system Technically it's possible there was some minor vignetting, but I certainly don't remember seeing anything noticeable at all.

The reason I didn't like using the Cokin system was due to the fiddly nature of setting it up and that stacking a few different GNDs gave a rather nasty red cast. The red cast can be negated in PP, but I wasn't too confident with the IQ. However I am very much a noob with this setup and I have seen great results from others.

It's also worth noting that the software graduated filter available in Lightroom is pretty good; however that means you would need to choose your exposure pretty carefully. This is assuming you don't do any bracketing or HDR etc...
10-24-2010, 02:42 AM   #6
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Hi guys,

Did we ever find a conclusive answer to this? I'm looking to pick up a Cokin kit for my 15mm (probably from Adorama so I can pick up some other bits and pieces like film) and it would be great to get a guide of what to get.
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