Question regarding Leica Ltm to M adapter

[hoanpham]

I have a question,
when looking for an Leica Ltm to Leica M adapter, there is a pair of number (bold), what are these number for?

M39 LTM LSM Leica Screw Mount to Leica M Mount Lens Mount Adapter 28mm 90mm
M39 LSM LTM screw mount Lens Adapter for Leica M 35-135

Can one adapter to be used with canon ltm 50/1.8, 50/1.4, and 50/1.2 ?
what 'pair number' should I look for?

Thanks.

[LucisPictor]

Those numbers indicate the framelines that are reflected in the rangefinder of the Leica M camera.
If you want to use it on a NEX or Fuji (because you have an M-adapter already) that doesn't matter at all.
On a Leica M (any model) it is very impoartant.

The combinations are not free, there are only certain combinations that are determined by the combination of frames in the rangefinder.

http://de.wikipedia.org/wiki/Leica_M

[kuuan]

yep, I have two LTM>M adapter, one says 28-90, the other 35-135. Using them on GXR M I don't see any difference, to tell the truth they actually look identical to me.

[hoanpham]

Thanks, especially to Carsten, i am reading.
I will use the cheapeast first, then upgrade if needed.
Samples follow shortly...

[hoanpham]

[scsambrook]

The numbers on the adapters refer only to the frame lines they will select on the Leica M series cameras. In all other respects they are identical and it matters not at all which one you use on your NEX.

You ask "Will an adapter, like 35-135, also cover 90 on M8 or M9?" to which the answer is "No - only an adapter marked 90 will show the 90mm frame". If you're going to use an M camera, make sure you get the adapter which is specific to whatever focal length you're going to use on the body

[hoanpham]

Thanks Stephen.
Got it.

Basically an adapter 50-75 shows 50mm lines (outer) and 75mm lines (inner) on the leica bodies view finder.