I am trying to understand how to distinguish between the different kinds of Switar lenses on the used market.
Basically, I am looking for a good 25mm lens to use on a Kodak K100. My experiences so far have been renting a lens from DuAll in New York City last time I was there. The lens was marked "C Switar" and the results were great, but unfortunately they are selling it for US$ 450 which is much much more than I can afford. I had picked up another Switar lens only to later learn about the difference between lenses designed for reflex and non-reflex Bolexes. The back end was too long for the K100. The strange thing is that the "C Switar" was not marked "RX" like all other reflex lenses that I have seen and I have not come across another lens like it.
So here are the questions:
1. Is the Switar the best quality 25mm C-mount lens I will find?
2. Should any lens that doesn´t have too much threading work fine on my K100 if the lens is collimated to the camera?
3. Where can I find out about the history of these lenses to be able to distinguish between the different types if I am trying to buy one, relatively cheaply on-line?
Thank you all for any advice you can offer.
Richard