Wide angle lenses and filters

[fish]

Over the past couple of days, I've changed my bhphoto shopping cart three times. What's the issue? Well, there are two of them, actually.

1. Do I need slim filters on a Canon 17-40/4L to eliminate vignetting on a digicam? I understand that it's necessary on a film body, but does the 10D (with its cropping factor) use the entire glass? Can I use a standard thickness filter (we're talking UV and polarizer) or must I buy the slim versions. Downside of slim is that they often don't have front threads, so you can't use a standard lens cap.

2. Is it beneficial to buy multicoated UV and polarizer filters when used with digicams?

tia

[DoctorIt]

Over the past couple of days, I've changed my bhphoto shopping cart three times. What's the issue? Well, there are two of them, actually.

1. Do I need slim filters on a Canon 17-40/4L to eliminate vignetting on a digicam? I understand that it's necessary on a film body, but does the 10D (with its cropping factor) use the entire glass? Can I use a standard thickness filter (we're talking UV and polarizer) or must I buy the slim versions. Downside of slim is that they often don't have front threads, so you can't use a standard lens cap.

2. Is it beneficial to buy multicoated UV and polarizer filters when used with digicams?

tiaHey Fish, check the thread where you mentioned this issue before... I asked the same question as #1: http://www.dgrin.com/showthread.php?t=143&page=2&pp=10

the answer was that filters are neutral so edge/center isn't any different.

[fish]

Hey Fish, check the thread where you mentioned this issue before... I asked the same question as #1: http://www.dgrin.com/showthread.php?t=143&page=2&pp=10

the answer was that filters are neutral so edge/center isn't any different.
Vignetting isn't necessarily about glass quality, but thickness of the mount. If the mount is too thick on a wide angle lens, then it shows up in the corners of the image as dark areas. So...if the 10D doesn't use all the glass, then vignetting might not be a problem. I just don't know if it does (use all the glass) or not. :dunno

[DoctorIt]

Vignetting isn't necessarily about glass quality, but thickness of the mount. If the mount is too thick on a wide angle lens, then it shows up in the corners of the image as dark areas. So...if the 10D doesn't use all the glass, then vignetting might not be a problem. I just don't know if it does (use all the glass) or not. :dunnoI know the 300D doesn't. When I was buying a lens last week, a knowledgeable guy at the camera shop was telling me that all the negative reviews I read about the EF 75-300 IS USM in being not so sharp at the long end were mainly only in the edges, and that with my 300D I wouldn't notice. So basically, he saved me several hundred bucks as I was almost ready to in-debt myself for 70-200 f/4 L-series.