greg_jones3

If I understand the problem correctly, it sounds like your shutter speed and aperture controls are linked such that when you turn one, the other one also turns. Known as "EV Lock" in my world. Rollei's that had this had a control on either the shutter wheel or aperture wheel, I don't recall which. Right in the middle of the wheel as you are facing the camera, and you turn it to unlock it. It should be slotted so you can turn it with your fingernail. That will unlock the coupling. Having said that, I don't recall that the 3.5F had this setup so maybe you have an earlier model?

Additionally, don't get hung up on the "which is a better lens" discussion between Planars and Xenotars. I would gladly take either one, and always choose the one in better condition versus name of the manufacturer alone as a determinant.

I have a 2.8 E2, a 2.8F, and a late 3.5F. My favorite tends to be the 3.5F with the Planar 75mm lens. I think that is only because it is a small amount wider plus sharp as a tack, although they are all great as far as sharpness. The 3.5 F is lighter. As noted above, lens condition is a key determinant. Mechanical condition is critical too, including making sure of proper lens board alignment, collimation, nobody has swapped the lens around (the viewing and taking lenses were matched at the factory).

Go with the 503CW. I have learned not to invest much in older cameras that rely on printed circuit boards. I coveted a 203FE back in the day but I would not buy one now since maintenance and repair would be potentially a problem, if not an outright impossibility due to lack of electronic parts.

Maybe not "photojournalism" per se, but hey, at least he got out on an adventure and made some photographs. Alas, he has me beat in that regard.

Leica M10 w 35mm Summicron ASPH. In wonderful, lovely, fabulous Ancenis, France.

Taos, New Mexico with Leica M4 and 50mm Summicron

Leica M4 w/ 50mm Summicron

Somewhere on a farm in Oregon. Leica M10 with 35mm Summicron ASPH.

Interesting. I have had the 2XE and now have the Zeiss Mutar. There must have been something wrong with the copy of the 2XE I had, as you could tell it was awful just looking through the viewfinder. YMMV, of course.

Nikon D750, 80-200 Nikkor

Nikon with 105mm f2.5 lens.

Leica M4, 50mm Summicron V5