Leica Extension tube for DR?

ToddB · Aug 31, 2015

Hey guys,

I scored a MC meter and a Extension tube. The tube snaps on M3 body perfectly. How many stops do I have do I open up for proper exposure? Also.. doesn't the DR un-screw in the middle to go on tube? I thought I saw a picture somewhere on line where you can do that. I'm nervous about putting to much torque to un screw it.

Todd

Xmas · Aug 31, 2015

I'm on a small phone so you need to wait for confirmation but that looks like a focusing mount.

The DR lens head may not separate even if the non DR did, I had both but about 1970...

The lenses that separated from their rangefinder double heliciod could be screwed into a different heliciod that fitted into a mirror box called a visoflex that bayoneted on to the M body.

Turning your M into a SLR for macro photography.

You need a book to describe the myriad of options...

https://www.cameraquest.com/LMVisoflex.htm

Xmas · Aug 31, 2015

https://www.cameraquest.com/m50dr.htm

It does separate!

ToddB · Aug 31, 2015

Yhea.. I don't want to force the DR to un-screw it. Might unload this in the classified.

Todd

summicron1 · Aug 31, 2015

ToddB said:
Hey guys,

I scored a MC meter and a Extension tube. The tube snaps on M3 body perfectly. How many stops do I have do I open up for proper exposure? Also.. doesn't the DR un-screw in the middle to go on tube? I thought I saw a picture somewhere on line where you can do that. I'm nervous about putting to much torque to un screw it.

Todd

this is way way too long to be used on a dual-range, which is a 50mm lens designed to focus a bit closer, but not the really close macro range.

As others have said, this looks more like the focusing mount for a 90mm lens -- the lens head screws onto the front. I can unscrew the front of my 90mm f4 lens too.

Xmas · Aug 31, 2015

I recall mine was tight, but that was 45 years ago.

Xmas · Aug 31, 2015

summicron1 said:
this is way way too long to be used on a dual-range, which is a 50mm lens designed to focus a bit closer, but not the really close macro range.

As others have said, this looks more like the focusing mount for a 90mm lens -- the lens head screws onto the front. I can unscrew the front of my 90mm f4 lens too.

Correct but only the 65mm was able to focus to infinity on a visoflex, with the correct mount?

The summicron may not even fit it won't focus without a visoflex if it does fit, and the IQ won't be wonderful.

mdarnton · Aug 31, 2015

It's an 90mm/2.8 Elmarit focusing barrel, if I'm not mistaken. The glass is probably living on a Visoflex somewhere.

Xmas · Aug 31, 2015

The rangefinder mounts and the lenses were matched by a two character code so a lens head will be lonely?

Saganich · Sep 1, 2015

Agreed, Elmarit 90 barrel. The DR glass does unscrew for use in an enlarger mount DMUOO 17672 along with an aperture control hood VTROO. Also can be used with bellows one would suppose.

John Koehrer · Sep 2, 2015

Any lens longer than 65mm will focus to infinity on a Visoflex with the right adapter.
The adapters and focusing mounts can be pretty confusing.

Leica Extension tube for DR?

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