Extension Tube

[peterc]

Any information, or a pointer to information, on using this LTM extension tube would be appreciated.
TIA
Peter

 

[Glenn2]

I think you pretty much need some sort of reflex housing to use these things. Only useful for close up to macro range. At one time I adapted a 50mm Componon enlarger lens to LTM, and used it on a Visoflex with tubes like yours to shoot macro. The enlarger lens had a very flat field and worked well. Still have a couple 50mm extension tubes and a single 25mm one. Haven't used them for years.

 

[bob cole]

Extension Tube

Any information, or a pointer to information, on using this LTM extension tube would be appreciated.
TIA
Peter

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Peter, maybe this will help:

 

[peterc]

Thanks.
I suspect using on an RF would entail a set of focus tables, measuring and a bucket of math to get the exposure right.

Peter

 

[venchka]

Thanks.
I suspect using on an RF would entail a set of focus tables, measuring and a bucket of math to get the exposure right.

Peter

Yup. Kinda like trying to use a pick up truck to race Formula 1. Macro work is best left to the SLRs.

Good luck with the tables and the bucket of math!

 

[bob cole]

Extension Tube

Thanks.
I suspect using on an RF would entail a set of focus tables, measuring and a bucket of math to get the exposure right.

Peter

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Not necessarily, Peter, if you're talking about exposure and not about size...Fifty years ago, when I knew nothing about any of this stuff, I used to take close ups of postage stamps by bracketing...trial and error ...and keeping notes...until I found the correct exposure...Since I developed my own film and also cut bulk film, expense didn't enter into it...you could probably do the same thing...Actually I used an older version of the Leica Focoslide called an OORES...Each gives you a ground glass for precise focusing with a rangefinder...By coincidence, I just sold the OORES on That Web Site...

 

[rbiemer]

I have a scan of the instructions from a set of FSU LTM extension tubes. I could post 'em if anyone is interested? I can't read Russian but they seem to be a set of tables for determining the field of view and magnification with the various tubes(and combinations) and maybe exposure compensation? I got the tubes to use as part of a pinhole set up.
Rob

 

[Trius]

Yup. Kinda like trying to use a pick up truck to race Formula 1. Macro work is best left to the SLRs.

Good luck with the tables and the bucket of math!

Olympus 35 SP w/MCON-40.

 

[Trius]

Peter: You can use some frosted acetate in the film gate and determine focus distance and parallax offset empirically. Exposure compensation will be by calculation/table.