odklizec":r7e4kmsl said:
Hi Tom,
I'm definitely planning to add an M mount section for user lens reviews so virtually anyone would be able to post their experiences with various lenses.
As for the official M mount lens compatibility list, it's not available yet. I will be advised when it is available, but I guess this will not happen before the official camera availability.
I did not think you would miss out on an M mount section. (smile)
I still think that virtually all M mountable lenses must fit otherwise "why bother?". However the fact that they have produced a measuring frame struck me with a moment of horror thinking perhaps that quite a number might not fit and we are back to the position of all other EVIL type and dslr cameras where a good number of quite desirable M and LTM wide angle lenses simply cannot be mounted on anything other than a genuine Leica or clone clone body. So the internal dimensions of the Ricoh M mount module are as important as the many other features that Ricoh had to get right.
As the demand for wide angle lenses is huge it would be a pity if users were denied the ability to use such greats as the Russian Jupiter-12 35mm f2.8 which has a 20mm rear protrusion behind the flange. All biogon designs will have similar problems.
Therefore we still don't know but the first thing I will be wanting to know is whether or not the J-12 will actually fit because if it does then most other lenses with rear protrusions will fit also.
I also believe that to exclude many of these lenses would place the Ricoh M mount module in much the similar position of any other camera with a dumb M mount adapter. Surely this was not what Ricoh was all about and wasting so much time and effort developing what is in effect a modern M mount camera in aps-c format.
The more lens types excluded then the less relevant the M mount module might be. This might explain why Ricoh has not already produced a list of "will not fit" lenses. They simply do not think there will be many but cannot exclude the possibility.
I have rationalised that this is the case and Ricoh have simply produced their measing device (dip stick?) so that owners might be warned to first test their lens in it lest a collapsible (for example) lens impact on the sensor and cause an expensive repair bill. Be cautious rather than sorry. If this is the case then I am quietly optimistic that my wide lenses will fit as to think otherwise is a sorry story indeed.
However the question mark for many will hang heavily over the M mount module until some lens fitting compatibility facts are listed, not all are as adventurous (stupid?) with their money as I am.
I have a number of lenses with rear protrusions to test including the Jupiter-12, already mentioned, but also the Orion-15, Russar MP-2 and Ricoh's own GR-28 (surely it will fit!). Also collapsible - the Leica Summitar and Industar-22.
Of these I am hopeful that they will all work as long as the collapsible ones are not collapsed. If there is a problem I am already thinking of making up a neat looking slip collar to prevent the collapsible lenses being collapsed when used.
I have horror visions of someone using their GXR with a collapsible lens installed. Someone says "hey neat camera, what make is it? A Leica?" You reply "no it's a Ricoh, want a look?".
Impressed stranger looks at it, starts fiddling with the lens twist and pulls, and before you can say "stop!" has delatched the lens and smartly retracted it into the camera. "Oops!" he says, then grins sheepishly and hands the camera back ....
