Hi Leon, IIRC, the instruction booklet for my bellows advises against anything faster than f1.7, though it doesn't give a reason. A cheap A 50/2 works just fine on mine, but I haven't added a teleconverter to it so I couldn't guess whether it would be bright enough to focus.
Dan Scott [EMAIL PROTECTED] >Hi all, > >I am looking at permanently attaching a 50 mm lens reverse mounted on >my bellows - I usually use my FA50f1.4, but I'm starting to get annoyed >with taking it apart and putting it back together again. The question >I need answered is, as I'm going to dedicate a lens to the bellows, >which one would be best for my needs? > >I generally shoot with the lens stopped down to f16 or f22 to get the >greatest depth of field. My subjects are 3 dimensional, so a flat >field of focus is not 100% necessary. My subjects also tend to hide >from bright lights, so I can't use extra light to help me focus, and at >full extension of the bellows and a 2 times converter between the >camera and bellows (7 times magnification to the film), any extra light >is a bonus. > >I'll probably end up with a K or M f1.4 or a K f1.2, but the closest I >have come to an f1.2 is picking one up at a swap meet, so I have no >idea of it's optical performance compared with an f1.4 (particularly >reverse mounted on bellows for macro use). > >So my question to all you knowledgable people out there is: is a 50 mm >f1.2 as sharp as an f1.4 when stopped down between f11 and f22, and is >there anything you know about these lenses that I should know before I >go out and try to buy one? > >Any and all help is greatly appreciated. > > > Leon > >http://www.bluering.org.au >http://www.bluering.org.au/leon >- >This message is from the Pentax-Discuss Mail List. To unsubscribe, >go to http://www.pdml.net and follow the directions. Don't forget to >visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
