Larry, My memory/information is that the 40mm f2.8 Sonnar lenses for the Rollei RF35 were using up leftover glass from the Singapore Rollei 35S & 35SE and that the 80mm lenses were similarly unused Rollei Planar 80mm f2.8 glass. The size of the 80mm MF glass made this lens large for a 35mm camera. See http://www.adorama.com/catalog.tpl?op=detailsdisc&sku=RL8028RFB John On 22/01/2010 14:45, "Laurence Segil" <ljsegil@xxxxxxx> wrote: > How about some off the beaten track lens discussion, specifically, to get the > ball rolling, how have people felt about the venerable Rollei 40/2.8 Sonnar? > I have one in LTM mount, originally sold (this incarnation) with the Rollei > Rangefinder made by Cosina (lens too, I believe). I use my lens with the > screw adapter for use on M mount rangefinders. I find it an ideal lens for > the Voigtlander Bessa R3A (mine) or R3M (mechanical shutter purists), as the > camera has 40mm framelines, a 1:1 magnification viewfinder which works very > well with two eye shooting with the 40mm FL, and a short rangefinder baseline > just long enough to accurately focus lenses up to about 50mm (dicey beyond > that FL, I think). I think the lens produces lovely images with a classic > Sonnar look, not unlike the wonderful Zeiss ZM 50/1.5 Sonnar. I understand > that there is an 80 or 85mm big sister that Rollei also produced in very small > numbers for the same Rollei Rangefinder (Cosina made) that the 40mm was > originally matched for. I am very interested in learning more about this > longer lens is anyone on the list has knowledge of or experience with the > lens. I am curious as to list member's experiences and opinions with this > incarnation, as well as earlier versions, of this classic Rollei lens. > Larry