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I have a Zeiss 85mm f1.2 (50th anniversary) lens which originally had a Contax/Yashica mount. When I bought the lens it came with an Aaton mount. I want to install an EF conversion mount which I bought from Simmod, but it requires the original C/Y mount to be present, in order for it to attach to and I guess sit at the right height for flange distance etc. I've tinkered with making a shim/spacer out of a Canon lens cap, but it's not exactly as good as a nice machined metal part. And it requires me to find longer screws.. Anyway, my questions would be: 1) What is the correct distance from rear element of this lens to sensor/film plane? 2) Is there a way to source a C/Y mount for this particular lens? (Note it's quite a bit wider at the base than many potential "donor" contax lenses, I know because I've already destroyed a 50mm f1.7 *sorry) 3) Do spec sheets, blueprints, technical data or papers exist in a public domain for this particular lens? 4) Could someone please point me in the direction of a good resource for understanding how the C/Y mechanism works? I seem to have begun my lens *home servicing journey on a rather expensive lens, and I'm pulling a few too many hairs out with anxiety... Many thanks and hello!

Hi everyone, First of all, my name is Zranfisco, and I’m new in this world. A few days ago I found my grandfather’s old super 8 camera (a Yashica super 825), and I have not idea of how to use it, what cartridge I have to buy and things like that. So I was looking for information in internet when I reached to your forum, and I think that I could find the help that I need, I want to be a regular super 8 user. For example, I have already found the Wein Cell’s battery that substitutes old mercury 1.3V batteries. I think that my most important question is: What cartridges I can use? The camera was with a Kodachrome 40D, but internet say’s that now is impossible to process it. Thank you PD: more information about the camera YASHICA SUPER-825 -marketed in 1969-70 -silent super 8 cartridge -lens: Yashinon Zoom f: 1.8 \ F: 12-30 mm -zooming ratio: 2.5x -focusing: fixed -zooming: manual -filter size: 43 mm -viewfinder: single-lens reflex with adjustable eyepiece -viewfinder information: f/stop meter -exposure: auto exposure control; TTL EE, CdS photocell -EE lock: yes -film speed: auto for 25/40 and 100/160 ASA (daylight/tungsten) -CCA filter: built-in 85A filter; with filter switch; automatic cancelation with dylight cartridge or with -----filter key -filming speed: 18 fps -shutter opening angle: <180 degrees -sound: no -remote control socket: no -cable release socket: no -movie light socket: kodak type -film counter: 1-15 m -handle: retractable, chamber for penlight batteries -battery check button: yes -film drive motor: DC micromotor -power source: 4 x AA batteries \ 1 x 1.3V button cell for light meter -weight: circa 1000 g -dimensions: 55 x 125 x 195 mm \ 55 x 230 x 195 mm -tripod socket: 1/4" -made in Japan by Cosina Source: http://www.filmkorn.org/super8data/database/cameras_list/cameras_yashica/cameras_yashica.htm

All fully serviced by a qualified technician and all are carefully film tested by myself. Smooth operation, excellent cosmetic condition and crystal clear lenses. Braun Nizo 6080 Matte Box Kit - £299.99 GB Pounds Minolta Autopak-8 D6 - £79.99 GBP Yashica Electro 8 LD-4 - £59.99 GBP Canon 514XL-S with C-8 Wide Lens - £99.99 GBP Payments accepted via PayPal and shipping prices are not included (charged at actual cost). Please just contact me for all the details. Bill :)