It makes a difference. Except for the Tiffen, all the brands you mentioned are, most likely, good.Ed..
Can you tell me what Circular Polorizers are used for?.
If you think that makes sense, then you must have read someone else's post!..
The thin/wide angle ones are for those wide angle lenses and for the reason you stated..
Just make sure and get a multicoated one. HMC would be fine, pro if you are putting it on top o the line glass...
IMO, Heliopan and Singh-Ray are pretty much the best..
Stick with the higher-quality multi-coated filters. Heliopan, B+W and so on in the $100 range. The C-8080 has good glass and you don't want to degrade the image quality with a cheap filter..
Here a hint for using a circular polarizer on the C-8080: After you press the shutter button halfway to focus the camera, press the AEL button (auto exposure lock) on the front. You can take your finger off the shuuter button now. Then turn the polarizer until the image in the viewfinder is at it's darkest (for sky shots) or the reflections are gone (for water shots). Then press the AEL button again to release the exposure lock so that the camera will set the correct exposure when you press the shutter button again..
If you use the polarizer by itself, you should not have any vignetting. I don't have any on my C-8080 and I usually just screw the polarizer onto the UV-filter I keep on the camera all the time. These are both the regular thickness filters, not the narrow ones..
Just tested my C-8080 and I don't get any vignetting until I screw three regular thickness filters on the front. Weldonhttp://picasaweb.google.com/weldonmwilson..
Thanks for the advice. 3 filters without vignetting. Makes me wonder if they developed the C8080 with very big diameter glass to be able to stuff a 4/3 sensor into it in the next version... a project that may have then been aborted as dSLR prices (including the Oly dSLRs) became competitively priced with EVF-type bridge cams lke the C8080 and the other 2/3" 8mp sony sensor cameras of the day (Canon Pro 1, Nikon CP8800, etc)..
Oh, well. A topic for another day, but I hate the fact that the blood-line stopped with the 8080!!.