Elmar 1:2.8/50mm collapsible from 1965 usable with M10?

[01maciel]

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According to the M10 manual some of the old lenses cannot be used, e.g. Hologon 15mm/f8 or the Elmar 90mm/f4. Other lenses have restrictions and there are risks to damage the camera. But what about the Elmar 1:2.8/50mm collapsible from 1965? As @farnz pointed out in another thread, there three differenz Elmar lenses:

Am 21.8.2020 um 03:16 schrieb farnz:

Just to clarify, Bob, there are three different 50mm Elmar-M lenses (in bayonet mount), all collapsible:

• 50/3.5 Elmar-M (1953 -1962) Serial # 1,302 - 1,700,000
• 50/2.8 Elmar-M (1957 - 1972) Serial # 1,402,001 - 2,503,100
• 50/2.8 Elmar-M (1994 - 2007), Serial # 3,668,031 - n/a

 

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[Good To Be Retired]

Leica is quite conservative regarding such warnings.  Are you inquiring in regard to whether it is safe to collapse it into the camera or some other issue?

This thread, along with about a dozen others if you google something like "collapsing lens on Leica M10" may be of interest.  

 

Edited November 20, 2020 by Good To Be Retired

[jdlaing]

Yes it is safe. I use one.

[01maciel]

vor 1 Minute schrieb jdlaing:

I use one.

Thanks. Do you have an old one? No Restriction with focus to infinity or wide open at f2.8?

[jdlaing]

Just now, 01maciel said:

Thanks. Do you have an old one? No Restriction with focus to infinity or wide open at f2.8?

I have no problems with mine.

[01maciel]

vor 47 Minuten schrieb Good To Be Retired:

Are you inquiring in regard to whether it is safe to collapse it into the camera or some other issue?

When the lens is collapsible parts of the lens may extend into the camera and scratch the sensor.

Edited November 20, 2020 by 01maciel

[jdlaing]

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14 minutes ago, 01maciel said:

When the lens is collapsible parts of the lens may extend into the camera and scratches the sensor.

No sir. Look in the camera and the first thing you see is the shutter. THAT is what would be hit first. Collapse the lens while it’s off the camera and see how far the rear sticks out while collapsed. It doesn’t stick out far enough on the lens to hit anything. It is recommended to mount it while extended so as not to scratch the throat of the camera. Once mounted it won’t reach far enough into the camera to hit anything.

The one I have is a 2.0 Summicron from 1956.

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Edited November 20, 2020 by jdlaing

[UliWer]

It is impossible that anything from the collapsible Elmar scratches the sensor:

 

[jdlaing]

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