> > From: Jostein <[EMAIL PROTECTED]> > Date: 2005/12/19 Mon PM 01:07:19 GMT > To: [email protected] > Subject: Re: Stacking lenses for macro. > > > Tell your friend it's a great pic, Sylwek. :-) > > I'm looking for something to achieve ca. 4x magnification. > I have a bellows with a total extension of 130mm. That gives roughly 2.5x with > a > 50mm. A good 28mm lens would probably be optimal with a bellows, giving 4x at > 112mm extension. > > Or maybe the 31mm limited? The built-in lens hood is a PITA... > > However, a bellows solution is a second best. I hope to find an optically good > combination of two stacked lenses to give 4x. It is so much more convenient in > the field to use open-aperture metering...:-) > > So far I've tried FA 100/2.8 macro with FA* 24/2, and A*200/4 macro with FA > 50/1.4. The latter is a lot better than the former, but still not quite there. > > Stopping down the 50mm to f/2 improves contrast, but introduce more optical > errors with small apertures on the 200. This leads me to believe that the best > 50mm would be the one that is the sharpest at full opening, whatever that may > be... > > Jostein
That is, unfortunately, likely to be one that has a smaller maximum aperture to start with...... 50/2.8? > > > Quoting Sylwester Pietrzyk <[EMAIL PROTECTED]>: > > > Jostein wrote on 19.12.05 12:34: > > > > > I'd be interested to know if you have some experiences with moderate > > > wide-angles > > > reversed on a bellows as well. > > My friend who is well known macro photographer in Poland took a 13 mm lens > > from 8 mm film camera and reverse mounted it on *istD achieving > > magnification of roughly 7:1. Rsults are quite impressive like one here: > > http://www.plfoto.com/zdjecie.php?picture=329380 > > > > -- > > Balance is the ultimate good... > > > > Best Regards > > Sylwek > > > > > > > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > ----------------------------------------- Email sent from www.ntlworld.com Virus-checked using McAfee(R) Software Visit www.ntlworld.com/security for more information
