it's not as bad as you think on most days. i used a polarizer on my Sigma 15-30 on the *istD. there were times when it was really noticeable on the sky, and there are times when it isn't.
Herb... ----- Original Message ----- From: "Andre Langevin" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, June 29, 2004 11:12 AM Subject: Re: 20mm filters > Any polarizer on a 20mm will give a weird result as polarization > won't be uniform over the whole field of view.
