Archived posting to the Leica Users Group, 2008/05/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]It would be logical thst some of the lenses are designed for a slightly larger image circle than 42mm, so that the corners will perform better, but not substantially larger. Tom On May 8, 2008, at 12:49 PM, Mark Rabiner wrote: >> Hi Luggers, >> One time lugger, Ray Tai, now participating, I think, at the >> Rangefinder forum, has used some Leica R lens on the Hasselblad Xpan >> ( 24mm X 65mm). None of them have an image circle to cover 65mm but >> the 35 Curtagon comes closest. Ray noted that there was very little >> fall off at the edge of the R lenses' image circles (like the R28) >> and he thought that some older style lenses had larger image circles >> than some of the later models. Leica needs something to differentiate >> it from the excellent DSLRs from Canon Nikon and others and going to >> a square format - no more vertical and horizontal shots - like a mini >> Hasselblad - could be a way to do it. I wouldn't be at all surprised >> if they go square format - reinventing the 35mm format which Oskar >> Barnack is credited with starting (even if he wasn't first). Older >> lenses, if they do have a larger image circle might become sought >> after and suddenly more valuable. I am keeping mine. Look at what has >> happened to the price of Visoflexes with the M8. Photokina is going >> to be very interesting. I am going and hope to lay hands on an R10. >> Anybody else going to be there?? >> Cheers, >> Howard >> > > > Why though form an engineering optical design logical standpoint > would Leica > all these years be producing lenses which are up to spec way out > twice the > size of its image circle? > Seems like bad design to me. > Or weird design. > Or just plain weird. > The specs are just not going to be there very many millimeters out > of the > 43.3 crop circle. They're not going to be there because they didn't > have to > be. > > > > > Mark William Rabiner > markrabiner.com > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information