Bolex H16 RX4 + Schneider-Kreuznach Cinegon 10mm f/1.8 (Silver Version)

[Matthias Streicher]

Hi,

I just recently purchased a Bolex H16 Rex 4 camera and am currently looking for some C-Mount prime lenses. I am well aware that there are lens models intended to be used with reflex models (usually labelled RX) and lens models intended to be used with non-reflex lenses (usually AR). 

I just found this Schneider-Kreuznach Cinegon 10mm f/1.8 but I can't seem to figure out if this lens is suited to be used on a Bolex reflex camera as there are no engravings on the lens. I also could not find any information on that specific lens online. Can anyone help me with this or is there a way for me to test wether or not the lens can be used on a reflex camera?

Thanks

Matt

[Dr. Thomas Faehrenkemper]

It is a NON RX lens, but you can use it between f 4 and 22 without any problems. 

[Matthias Streicher]

Thanks for the quick reply. How would I be able to tell whether or not those lenses are reflex or non-reflex?

[Simon Wyss]

Those for Paillard-Bolex H Reflex cameras are marked RX. Engraved, lacquer inlay

[Philip Forrest]

Some lenses say RX on them. Some have "For Bolex" or "For Bolex RX" on them (flange area sometimes.) Angenieux lenses for RX say "Special P" on them. I think Som Berthiots say "H16 RX" or "RX". That said, it's not as simple as a label either. I'm going through this same issue, as I just got a REX 4. It comes down to the exit pupil and the nodal point of the lens itself. There's a few good threads here on the forum describing this and they link to a few pages which go into the lens design specifics even better.

Your 10mm is a retrofocal design, so it will put the exit pupil farther away from the film plane than a true 10mm (which would nearly touch the shutter since the registration of C-mount is 17.526mm.) I say go give it a try. It's one of the lenses that I've been searching for because I love Schneiders, and even if there is some astigmatism wide open, I'd still happily use it, personally. 

Phil Forrest

[Matthias Streicher]

Thanks for all the information - I really appreciate it. 

Go it - the only way to really test it is by shooting film I assume? 

[Dr. Thomas Faehrenkemper]

Yes.