Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Canon Lenses

Reply
 
Thread Tools Search this Thread
Old Jan 23, 2005, 9:20 AM   #1
Member
 
Join Date: May 2004
Posts: 33
Default

I am using a 17-40L lens with a 20D. The lens has a B&W F-Pro UV filter on(4mm mount).Can anyone recommend a square filter system that will not cause any vignetting problems? :idea:I want to use a 'polarizer' & 1 grad together if possible! Cheers, Barry.
barrylevers is offline   Reply With Quote
Sponsored Links
Old Jan 23, 2005, 1:41 PM   #2
Senior Member
 
Join Date: Dec 2002
Posts: 5,803
Default

I'm not sure wha tyou mean by a "square filter system", could you please explain? I have a polarizer filter of my 17-40 and it works well with no vignetting (as would be expected.) With two, you are right to worry about it.

Eric
eric s is offline   Reply With Quote
Old Jan 24, 2005, 11:38 AM   #3
Member
 
Join Date: May 2004
Posts: 33
Default

A square filter system is one like the Cokin X-Pro or Lee . You buy a holder with slots in & then slide in the filters that you want. Barry. I just need to know which works with the 17-40 ?
barrylevers is offline   Reply With Quote
Old Jan 24, 2005, 3:47 PM   #4
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,545
Default

I use the Cokin P series sometime on an even larger WA (82mm front filter)

You should have no problem since the 20D cropped the 17 down to only a 27 something...

NHL is offline   Reply With Quote
Old Jan 25, 2005, 11:28 AM   #5
Member
 
Join Date: May 2004
Posts: 33
Default

Sorry, I perhaps should have mentioned the fact that I have been using the Cokin -P filters on my 1n . When I bought the 20D with the 17-40L lens I found I was getting vignetting at 17mm! On the 1n vignetting starts at 21mm. So that system is no longer a viable option.

style="BACKGROUND-COLOR: #000000"Cheers, Barry
barrylevers is offline   Reply With Quote
Old Jan 25, 2005, 2:00 PM   #6
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,545
Default

The B&W F-Pro UV filter (4mm mount) has a front head - were you using the P-series on top of this B&W?

The stacking height(B&W + Cokin) @ 77mm may be what's cause the vignetting and not the P-series... You'll have the same problem with the X-Pro if you use the same 77mm adapter!

... Like I said my 17-35mm WA has a larger 82mm front filter thread :O
NHL is offline   Reply With Quote
Old Jan 28, 2005, 11:08 AM   #7
Member
 
Join Date: May 2004
Posts: 33
Default

I have tried theP system with & without the B&W uv filter on the lens & there is vignetting either way when used with the polarizer. Barry.
barrylevers is offline   Reply With Quote
Old Jan 28, 2005, 1:20 PM   #8
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,545
Default

How about with the guides in the horizontal position?
-> the filters are not really square but 'rectangular'

FYI - No vignetting reported with the 17-40L
http://www.robgalbraith.com/ubbthrea...b=5&o=&fpart=1 http://www.ephotozine.com/forum/view....cfm?qid=18610

Have you look @ the X-Pro 77mm adapter? :idea:
NHL is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 1:10 PM.