robert_parker Posted May 23, 2007 Share #1 Posted May 23, 2007 Advertisement (gone after registration) Here's a question that's been puzzling me for some time - I know you can code older M mount lenses to gain optimum performance with the leica M8... but what would happen if you took a screw mount lens, attached to an adaptor, similar to the type Voightlander make and attached that to an M8 - could you code the adaptor to allow for the approximate characteristics of the screw lens attached to it, or is there some type of technical limitation that would prevent this ?? Link to post Share on other sites More sharing options...
Advertisement Posted May 23, 2007 Posted May 23, 2007 Hi robert_parker, Take a look here Coding of older lenses. I'm sure you'll find what you were looking for!
cbretteville Posted May 23, 2007 Share #2 Posted May 23, 2007 Robert, Leica chose a coding scheme that allows for 63 individual IDs. 27 of these are assigned as of today to current and previous generation lenses. What they chose to do with the remaining ids is anybody's guess, but I feel confident that a substantial part of the reserve will be reserved for future lens designs. Had they chosen 8 bits rather than six we'd had 254 IDs to play with, and off cause there is the "select you lens from a menu" idea which could open up possibilities. The other part to this is how much work is required in the lab to get the data the camera needs to make it's corrections. As far as picking an existing code and applying it to whatever you chose to put on your adapter, the camera will believe you've attached a 50 'cron if the detector reads that code and the frame selector lever is positioned correctly. What you've actually attached it has no way if knowing. - Carl Link to post Share on other sites More sharing options...
stephengilbert Posted May 23, 2007 Share #3 Posted May 23, 2007 You can code a screw mount adapter to "fool" the M8. Just be sure you use an adapter that isn't cut back in the area of the leds that read the lens code. Some Leica adapters work, but not all. I don't know whether the Voigtlander adapters are cut back or not. The easiest way to code an adapter is to use on made by John Milich. They are not only not cut back, but have recesses cut in them where the coding is to be placed. Steve Gilbert Link to post Share on other sites More sharing options...
robert_parker Posted May 24, 2007 Author Share #4 Posted May 24, 2007 Carl and Steve That's interesting - Thanks for your help !! Link to post Share on other sites More sharing options...
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