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I'm about to add a collapsible Leica Summitar 50mm F2 lens to my collection (see attached). The lens comes with a genuine Leica m39 to M adapter. My technical question is:

 

When applying the the M39 adapter to the lens and then applying my M-to-T adapter:
   -   will I be able to properly focus (manually, I understand) on the T, and
   -   will the T camera be able to properly recognize the aperture that I chose ?

Please advise - if you know.

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Willy.

I do this very thing with my Canon 50mm F1.4 LTM, so with a LTM to M adapter (I have a few, some Leitz, some not). Works perfectly. In fact I am currently using an adapter from a friend in China which has the 6 bit coding on it, and I have coded the 50mm as such. This helps with LR when you are trying to rememnber which lens you used. So yes, it works. I have retrofitted the 6 bit adapter to my 28mm Elmarit as well, same result, LR shows the lens.

 

Second question. No, the camera will not know what aperture you used, none of my lenses communicate this information. I suspect the only ones that will are the genuine T lenses, with the appropriate electrical contacts to make this connection.

Gary

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Great. Thanks.

 

While it is of less importance for me to have LR or BRIDGE remember which lens I used, I am concerned about something else.

If the camera doesn't know what aperture I dialed in because the manual-only lens won't communicate this information to the camera, will I still be able to see in the EVF what the fall-off / bokeh is ? I am kind of a little "slow on the uptake" on the fact that the camera doesn't know one thing but does know how to record the picture correctly at the set aperture. After all, it's all electronic impulsing, and not really mechanically induced optical input only. Maybe a silly question, but this forum is the perfect venue to get embarrassed ONCE and for all. 

͡° ͜ʖ ͡°

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Umm, not really sure what you're asking. Silly is good, I do it all the time, so ask away.

If I get what you are asking though, yes, the camera EVF (or LCD) will show what it is going to "receive". I usually focus at max aperture, then stop down to whatever I want as soon as I am ready. So, for a close up shot, I'll focus at full aperture, then stop down as much as I can, to allow a decent depth of field. For a portrait I might only stop down a stop or two, but I still tend to focus at max aperture.

So, yes, when looking though the EVF you will see whatever the sensor is seeing, full aperture or working aperture, whatever you have set. Bokeh, and fall off will be seen.

Gary

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No worries Willy.

I'm finding that the T is a great digital back for anything and everything I want to attach it to. Ranging from my 28mm Elmarit M right out to the astro telescope. I even tried it with a couple of old Pentax 67 lenses yesterday.

It's a great camera.

Gary

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Gary,

What T adapter do you use to mate the Leica T to the Astro scope, if you don't mind me asking? (Sorry to hijack the thread.)

 

Brent

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Hi Brent,

I have an e bay (so, cheap), EOS to Leica M adapter. Everything I do on the rear of the scope is EOS, it is virtually universal.

So, putting it front to rear: 2" output from the focuser, then a 2" to T threard adapter, then the EOS T ring (giving me an EOS male bayonet). Then the afrementioned EOS to M adapter, and finally the T with the usual M to T adapter fitted.

For wide field astro I use a couple of old Pentax 67 lenses, one a 75mm f4.5, the other a 200mm f4. Both of these get used with another e bay Pentax 67 to  EOS adapter attached (this also having a tripod foot is beneficial). So again, the T attached to them with the EOS-Leica fitting.

Help?

Gary

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Hi,

The EVF/Screen display as a "live view" - so you can see the in- and out-of-focus area.

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Hi Brent,

I have an e bay (so, cheap), EOS to Leica M adapter. Everything I do on the rear of the scope is EOS, it is virtually universal.

So, putting it front to rear: 2" output from the focuser, then a 2" to T threard adapter, then the EOS T ring (giving me an EOS male bayonet). Then the afrementioned EOS to M adapter, and finally the T with the usual M to T adapter fitted.

For wide field astro I use a couple of old Pentax 67 lenses, one a 75mm f4.5, the other a 200mm f4. Both of these get used with another e bay Pentax 67 to EOS adapter attached (this also having a tripod foot is beneficial). So again, the T attached to them with the EOS-Leica fitting.

Help?

Gary

Oh yeah--that helps alright. Thanks.

 

I have an M to T adapter and a T-ring for the R. Maybe I'll just get the R to M adapter and use that with the M to T. Then I can use my R zooms on the T as well (although I'm not sure why I'd want to . . . at least not regularly. They're so big).

 

Cheers and clear skies,

Brent

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