topic Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm in EOS DSLR & Mirrorless Cameras

Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

vincekk — Wed, 02 Jul 2014 11:06:12 GMT

Does somebody have a solution for this problem?

Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

Skirball — Wed, 02 Jul 2014 15:04:02 GMT

SHow corners? Perhaps the corners of the lens hood? If that's the case you probably don't have it set properly; make sure it's firmly seated and locked in. Or, perhaps you're using a 3rd party hood?

There's some amount of vignetting (easily auto-corrected in most processing programs) when on the wide side of the 17-40, but you still get full use of the sensor.

Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

vincekk — Wed, 02 Jul 2014 15:22:35 GMT

I found it. It is the polarizing filter. It seems that this lense doesn't accept two filters. A glass filter and the polarizing. Thanks for your feedback it halped me looking at this.

Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

Skirball — Wed, 02 Jul 2014 15:43:32 GMT

Yes, stacked filters will show on most wide angle lenses. Even at more standard focal lengths on some lenses.

Might I ask, what is the glass filter? If it's just a UV filter, take it off when using a polarizer or ND.

Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

hsbn — Wed, 02 Jul 2014 16:26:47 GMT

And you are probably not using low profile filter. I can stack 2 low profiles filter on 16mm just fine.

Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

amfoto1 — Wed, 02 Jul 2014 17:22:39 GMT

@hsbn wrote:
And you are probably not using low profile filter. I can stack 2 low profiles filter on 16mm just fine.

If it's the Canon 16-35/2.8L II you're referring to, that uses 82mm filters. The 17-40 uses 77mm.

"Slim" filters tend to be more expensive. And some of them don't have threads on the front, so need a special lens cap.

B+W's "standard" mount filters are pretty slim to begin with (tho they to offer slim, as well)... I've never had any vignetting problems with them on even the widest lenses. But I also would never stack a polarizer on top of a clear "protection" filter. Previous response to remove the clear filter first, before installing the CPL, is correct.

***********
Alan Myers

San Jose, Calif., USA
"Walk softly and carry a big lens."
GEAR: 5DII, 7D(x2), 50D(x3), some other cameras, various lenses & accessories
FLICKR & PRINTROOM

Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

hsbn — Wed, 02 Jul 2014 17:26:52 GMT

🙂 ... I often stack ND with CPL to prolong shutter speed because my 3stop ND sometimes is not enough. I may get around to get the 6 stop or 10 stop soon.

Re: Canon 5D and 17-40mm 1:4l lense shows corners at 17mm

Skirball — Wed, 02 Jul 2014 17:43:00 GMT

@hsbn wrote:
🙂 ... I often stack ND with CPL to prolong shutter speed because my 3stop ND sometimes is not enough. I may get around to get the 6 stop or 10 stop soon.

Yup, I've done this on my 17-40 and didn't have issue, but I have the B+W XS-Pro CPL, which is super slim.