Hi Greg, You did not mention which brand of lens you have. Both Nikon and Canon make a POL filter with it's own drawer so that you can rotate it with a small knobby on the outside. Contact your local vendor of good pro gear and they may be able to locate one for you. I also understand that there is an aftermarket one as well, but have not seen it for some time and is very likely a special order - - read expensive and slow to a r r i v e. Les ----- Original Message ----- From: "Gregory david Stempel" <fyrframe@centurytel.net> To: "List for Photo/Imaging Educators - Professionals - Students" <photoforum@listserver.isc.rit.edu> Sent: Friday, February 21, 2003 9:45 AM Subject: Big polarizer? > I have a older 500 f/4 monster telephoto. I have been wondering of late, > about polarizing this baby. It uses the typical internal small filter > drawer. Do they make a polarizer to fit internal filter holders? Do I need > to get something like 105mm (just guessing) polarizing filter? > > Take care, > Gregory david Stempel > FIREFRAMEi m a g i n g > >