Archived posting to the Leica Users Group, 1999/11/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]P.S. I thought of using this method, but using a 55-49 step down and the otional 49mm ring for the Uni. Pol. that Leica sells for the 135mm. More expensive, but it may look nicer and grab the Pol. better. In R lenses I found that I could step down the 100 APO from 60-49, the 60mm from 55 to 49, and the 35 Summicron from 55-49 without vignetting. (Look at the space between the edge of the element and the filter threads.) The 21mm M definitely doesn't like step downs! Tom Schofield - ----- Original Message ----- From: <InfinityDT@aol.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Tuesday, November 30, 1999 11:26 AM Subject: [Leica] Leica Univ. Polarizer on 90 APO > In a message dated 11/30/99 2:09:46 PM Eastern Standard Time, > jplaurel@microsoft.com writes: > > << I wish there was a > way to use the flip polarizer with it, but I expect if they made the flip > pol large enough to accomodate this lens, it would interefere with the RF. > > --Jim >> > > If the 90 APO has the same E55 front mount as the non-APO 90/2 then it is > entirely possible to use the Universal Polarizer on it. I made an adaptor > using info that was posted on the LUG a long while back. If you have access > to a bench grinder or a Dreml tool and are handy you can make it yourself for > about $20 or less. You start with a 55-52 step-down ring, then (using > Loc-Tite) add a narrow 52mm ring from an old filter you've removed the glass > from; then you add a 52mm Cokin "A" adaptor on which the outer flange has > been ground down to the same diameter as the other adaptors for the Univ. > Pola. (The reason for the 52mm reduction and filter ring is to allow the > retaining screw of the polarizer to engage behind the adaptor flange. If > anyone is serious about wanting to make one for their 90 Summicron (APO or > otherwise) I can e-mail a picture of mine. > > DT >