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Jerry Attrik

35mm. f/2.8 Summaron

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This an enquiry for help.

I may have the opportunity to buy a 35mm. f/2.8 Summaron screw fit.

The serial number 1678### dates it to 1959.

It looks like it may have been issued as 'M' fit.

I have read that some 'M' fit Summarons were issued with the screw/bayonet adaptor.

Is there a way to find out if this lens was one of those?

Any help would be much appreciated.

D.Lox.

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A genuine screw mount will focus to 1 metre, whereas an M Mount will focus to 0.7 metres and an M Mount with goggles will focus to 0.65 metres.

William

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7 hours ago, willeica said:

A genuine screw mount will focus to 1 metre, whereas an M Mount will focus to 0.7 metres and an M Mount with goggles will focus to 0.65 metres.

William

Exactly ; and be aware that items in screw mount with focus to 0,65 do exist (reworked goggled items) and do not couple correctly with the rangefinder : btw, they occur just in the 1.6xx.xxx range  (i have one, bought by curiosity for 100 Euros...)

 

Edited by luigi bertolotti

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13 hours ago, Jerry Attrik said:

I have read that some 'M' fit Summarons were issued with the screw/bayonet adaptor.

Is there a way to find out if this lens was one of those?

Yes, mine has the factory delivered dual LTM / M mount.

I guess the telltale sign is a tiny screw on the mount. No having an M mount only version I can't be sure they don't have this screw but I see no reason why they would have it.

Mine is 1629605 and focuses to 0.7m

 

Of course though, as spydrxx, hinted, if the adapter has been taken off and misplaced it's another story. I've hardly used mine as LTM so I'm not sure if there are any signs once the adapter is off, except of course the focusing distance.

Edited by ianman

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