Canon Lens Adapter B - FD to Leica Screw

[rustysheepdog]

I've just got a Canon Lens Adapter B which lets one put FD lenses onto a Leica RF body . . . straight on to a screw one or with a bayonet adapter onto an M. No rangefinder coupling, of course. I had one of these many years ago and its especially useful for wide angle lenses where focusing can be done by estimation. BUT, I can't remember how one disengages the auto-diaphragm operation on FD lenses - it has to be done to let the iris stop down. Can someone remind me? Googling hasn't produced a reliable answer . . .

 

[Mackinaw]

Depends on the type of FD lens you have. For the older breech-lock "ring" lenses, grab the largish "stop down" lever at the back of the lens and move it (along it's slot) until it locks. Then attach the lens to the adaptor. The newer "bayonet style" FD lenses are more difficult, they require a little plastic gizmo that you insert next to the stop-down lever. Good luck trying to find this little adaptor. You can build your own, cheaply, but I never have. Maybe somebody who has can tell you how to make one.

Jim B.

 

[raid]

I use aluminium foil that I fold into a "small gizmo". Voila ... it works. The plastic one is difficult to find.

 

[raid]

I find this adapter to be very useful. I use it with several FD lenses and also one FL lens.

 

[rustysheepdog]

Thanks folks! No problems with the old FD breech-lock lenses once I realised you have to move the locking collar from the off-camera to the on-camera position. Then just push-and-click!

And a similar routine for the later type mounting, but I used a short extension tube to simulate being on the camera before using the kichen foil tactic.

Many thanks indeed, now I can play with my Canon lenses😀 PS And my assortment of Tamrons and my Cosina 20mm - !