flamingo said:
Huck, while the Rollei 35RF sounds like a great alternative, (improved close focus and no 90mm framelines), how do they achieve improved close focus ? Is it a logarithmic insteaed of a linear "throw" optimized for the wide focal lengths ? What is the "longest" focal length frameline on the Rollei ?
Flamingo, the standard close focus distance of Leica M cameras is 0.7 meters (27 inches). All of the Leica standard & wide angle lenses are built for a minimum focus distance of 0.7 meters.
For some reason, when Cosina came out with the Bessa R, the built it to rangefinder couple to a close focus distance of only 0.9 meters (about 3 feet). When they came out with the upgraded R2, it remained 0.9 close focus distance.This was odd since many of the Cosina lenses by that time (2002) were built to a minimum focus distance of 0.7 m, although some of the early lenses like the 50 Nokton & 35 Ultron were only 0.9 m.
I don't have any idea what the engineering issues were that led them to choose the longer close focus capability for the R & the R2, but I do know that my Rollei 35 RF close focuses to 0.7 m, which means that it is rangefinder coupled to focus lenses with this minimum focus distance & that the viewfinder is parallax corrected to this distance as well. I suspect that this was an important specification for Rollei because the whole point of the camera was to feature their legendary 40/2.8 Sonnar lens & I expect that they wanted a camera that could take full advantage of its capabilities - which included a minimum focus distance of 0.7 m. Rollei was perfectly happy to use the R2, but they needed this spec to be improved.
When Cosina developed the R2A & R3A, they retained the close focus capability that they had developed for the Rollei 35 RF, so these 2 cameras have the 0.7 close focus distance.
The frame lines in the Rollei viewfinder are 40/50/80. I use the CV 75/2.5, which works perfectly well with the 80 frame lines because it is actually a little longer than 75 mm. As measured by Popular Photography, it was 77 mm when they tested it. This is a close enough approximation of 80 mm, given that few lenses measure exactly what they are marked anyway. To my way of thinking, this is the ideal "long" lens for the R2 or R2A because the base line of these cameras forces you to use a 90 mm lens with a slower maximum aperture of f/3.5 - & the 75/2.5 is so compact for its focal length, something which I prefer in a RF camera. When I want to shoot longer than this, I use my SLR, which handles these longer focal lengths better anyway. The R3A, of course is more capable with longer lenses. But even with the increased magnification, faster 90 mm lenses of f/2 & even f/2.8 sometimes can be challenging for critical work.
Cheers,
Huck