Lens mount diameters: Micro Four Thirds, Nikon 1, Pentax Q

<p> Howdy! I'm trying to find out the lens mount diameters for Four Thirds, Micro Four Thirds, Nikon 1 (CX), and Pentax Q lens mounts. But the manufacturers seem to be refusing to publish them.<br>

Anyone out there who might have these stats, or have these cameras and a handy pair of calipers?<br>

Thank you!</p>

<p>your main concern should be the refistration distand.<br>

yjr 4/3 is shorter that all film slr's and these older lenses can be adapted to the 4/3 system</p>

<p>M4/3 the 'hole' is 41.15 or 41.17mm with 'flanges' reducing this to 39.86 when measured one flange only. So I make that the flange is 1.29mm [ flange or tongue?]<br>

That is measuring an Oly E-PL1<br>

The lens is easier to measure with the 'barrel' 38.35mm plus flanges [2] 40.68mm<br>

Pany 14-42.<br>

Caliper is un-named digital</p>

<p>You will find lens to sensor distances at this useful site<br>

<a href="http://www.markerink.org/WJM/HTML/mounts.htm">http://www.markerink.org/WJM/HTML/mounts.htm</a><br>

M4/3 is shorter than 4/3 and the diameter is smaller than 4/3. My feeling is that some E-bay vendors don't know the difference. 4/3 is to an older Olympus standard. I'm not exactly clear on this but did get a 4/3 adaptor in error, mine, when I was first looking last year.</p>