......1 of the problems that many people have w/the Contax II/III & the Kievs is that it can be easy to block the RF window w/your right-hand fingers (in their instruction manuals, Zeiss Ikon recommended an awkward "crab" grip where the user was supposed to use his/her middle finger to work the focus wheel & release the shutter w/the index finger). In their post-WWII IIa/IIIa models, ZI changed to a shorter baseline (in smaller bodies); Nikon did something similar w/their RFs.
I do agree and do not understand why the Zeiss designers or Kiev following manufacturers, didn't redressed this design fault via an external support for the smaller fingers. This was not an issue of technology.
The "Contax grip" is logical for the thumb, the index and middle fingers (the middle finger resting on the small wheel).
But then the two smaller fingers are requested by implication to perform two contradictory tasks. First and not fully ergonomically friendly, to counter-pressure the action of the thumb in the general gripping of the camera - a task which is somewhat unfortunate for the weakest fingers of the human hand.
Making it worse, is the fact that elevating the middle and index fingers over the top casting of the camera, creates a natural gravitation for the two smaller fingers to follow suit, and thus further weakening their counter-pressure task, or worse, naturally leading them to block the range finding window.
The whole mess could be avoided had the Zeiss designers or Kiev followers provided us with some kind of support for the smaller fingers, below and paralel to the range finding window. I, e, blocking the smaller fingers to go "top-wards". Had they provided it, the whole Contax grip would become much easier to follow.
Nevertheless, it is possible to overcome this problem with the help of some flat but a bit strong plastic strap of some 8 ~ 10 cm length, punching both extremes and inserting both extremes through the self timer outer and big screw, creating a kind of loop to give sustain for one of the smaller fingers. This mini strap will not offer a counter pressure barrier, but it will take care that the smaller fingers stay in place.
WARNING: the big screw of the self timer lever has very little tolerance for weight carriage (it wasn't designed at all for such a mission!), therefore the Kiev user interested in studying this method, MUST take care the plastic strap is indeed FLAT, not only strong, to enable the self timer screw to return as much as possible to its almost full screwing limits.
Cheers,
Ruben