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85 Summarex anyone?


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Hello John,

 

Some of the early production of this lens, but not this 1, had marks for the earlier "European" aka "Continental" aperture openings which are 1/3d of a stop smaller than our currently used "International" system.

 

Utilization of either system, of course, does not have anything to do w/ the largest opening which may be:

 

International = 4,

 

Continental/European 1/3d of a stop smaller = 4.5

 

1/3d of a stop larger than International = 3.5

 

1/2 of a stop larger than International = 3.4

 

Or simply"Other" = 0.95 = 1/7th of a stop larger than the current International system

 

Best Regards,

 

Michael

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Thank you, IMHO overpriced.

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There is at the minimum one Summarex-screw monut,

( in chrome )

with an stuckt on M-adapter, made in the Leitz factory.

The adapter is also fixed with 2 screws.

This lens came directly from the Leitz factory to our collection.

 

The technical design of tis lens is no official evidence,

that Leitz build a Summarex with M-mount;

everyone can stuck on a M-adapter...

 

But we are confident that Leitz tested one Summarex

with M-mount.

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May be some people are interested to see inside of the Summarex lens :

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May be some people are interested to see inside of the Summarex lens :

I've always been curious to know what the two circles on the lens hood are used for. On the hood in the picture they are red and black, on my lens they are both black.

 

Bob.

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Hello sabears,

 

By the positioning & circumstance of the tripod thread it is clear this lens was built for a 1/2 frame camera which fitted on a special 1/2 frame tripod in order to produce 18 X 24 negatives/transparencies. It's too bad Jean Claude was not able to also get the original lens hood & has to use a full frame version. I wonder if the full frame version produces a lot more flare than the 1/2 frame original?

 

Best Regards,

 

Michael

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I've always been curious to know what the two circles on the lens hood are used for. On the hood in the picture they are red and black, on my lens they are both black.

 

Bob.

They help you positioning the hood in reverse position to engage the 2 plots before to turn an lock it

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Hello sabears,

 

By the positioning & circumstance of the tripod thread it is clear this lens was built for a 1/2 frame camera which fitted on a special 1/2 frame tripod in order to produce 18 X 24 negatives/transparencies. It's too bad Jean Claude was not able to also get the original lens hood & has to use a full frame version. I wonder if the full frame version produces a lot more flare than the 1/2 frame original?

 

Best Regards,

 

Michael

When you see the curvature of the 2 first lens you can imagine the lot of confusion in between the light rays passing thru :confused:

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JC,

It is extremely interesting, but you didn't need to take a saw to your lens just for us :eek:

 

:D

 

John

 

That's not a problem for JC... in case you don't know, he's a first class sport shooter : to exercise, he often targets the front lens of 5cm Elmars from 100 meters... there are lot around... :)

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The lens-cut was made in the Leitz factory

in the section for apprentices.

2 cutaway models from the Summarex are known.

 

I guess the left and the right half of a Summarex :p

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Hello Alex,

 

That is not clear. In dividing something like a lens it is not always possible to end up w/ 2 symetrical sections which both look good. Sometimes it is necessary to sacrifice part of 1/2 to end up w/ the other 1/2 in the manner you want it.

 

Also: It may take a # of attempts w/ a number of lenses to produce 1 acceptable cutaway.

 

Best Regards,

 

Michael

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