I'm looking at the 77mm CP filters available and I don't know the difference in these:

http://www.bhphotovideo.com/c/produc...Polarizer.html

http://www.bhphotovideo.com/c/produc...an_Linear.html

http://www.bhphotovideo.com/c/produc..._Circular.html

Is there a difference in what you need for a wide angle lens?

Hmmm.

Those are more expensive than the one I use on my sigma, mine was around $70 maybe?

I don't think you want the linear one though, I think you want circular for a digital.

Originally Posted by thechickencow

Hmmm.

Those are more expensive than the one I use on my sigma, mine was around $70 maybe?

I don't think you want the linear one though, I think you want circular for a digital.

You're right I didn't mean to look at linear ones.

Was your $70 one multi coated? Do you know what brand it is?

Mine is Hoya, multi-coated, and was around $75. You can spend more, but I think the midrange, ~$70-$80 work pretty well.

Mine is a Kenko, I'm not sure if its multicoated and not sure if thats a big deal. Mine seems to work though.

This is the one I'm about to pick up...

http://www.bhphotovideo.com/bnh/cont...=133003&is=REG

Yeah, it's pricey, but it should be good quality. My current one vignettes at the wide-end and it drives me nuts. It's the same model, just not the slim type.

I shoot with a Linear Hoya on my Digital an never had a problem. Weird.

Originally Posted by Stime187

This is the one I'm about to pick up...

http://www.bhphotovideo.com/bnh/cont...=133003&is=REG

Yeah, it's pricey, but it should be good quality. My current one vignettes at the wide-end and it drives me nuts. It's the same model, just not the slim type.

What is the current one you're using?

My Hoya--which is not a slim model--does NOT vignette at all on my Sigma 10-20mm.... that's the reason I chimed in. You don't need to spend the extra money on a slim filter like Scott does, because the Sigma doesn't have that issue.

Originally Posted by Markitos

My Hoya--which is not a slim model--does NOT vignette at all on my Sigma 10-20mm.... that's the reason I chimed in. You don't need to spend the extra money on a slim filter like Scott does, because the Sigma doesn't have that issue.

Great to know, thanks.

Yeah, I haven't noticed that either, which is good news for us sigma duders.

There's a slim mount CP from Hoya that is multicoated and fits a lens cap... I forget the model.

The same filter is available as both a Sigma and through Ritz Camera as a Quantaray. It's probably available under other names too. I bought the Quantaray one locally for in the $70 range... the Sigma branded version of the same filter was like $130.