Tessar Serie XIV1 1:4,5 F=50 cm coverage

claudius · Feb 26, 2016

hallo
anyone knows the coverage of this huge piece of a lens ??
i cannot find any info on this particular lens.
klaus

Dan Fromm · Feb 26, 2016

Please check your description of the lens. f/4.5 Tessars are, in Zeiss' language, Serie IIa. The XIV1 you report sounds like a garbled version of a mount size.

A 50cm/4.5 Tessar will, according to a 1910 Zeiss catalog, cover around 400 mm. Later f/4.5 Tessars have more coverage.

Please tell us your lens' serial number. That will allow an estimate of when it was made, i.e., which design it is and what its coverage is.

claudius · Feb 27, 2016

thanks dan
i had a closer look at the Picture of the lens
on the outer rim of the front element it says 12 92488
on the rim of rear element it is stamped 92488.
marked on the barrel XIV 1

hope this will help. ( sellers offer stand until sunday morning)

Dan Fromm · Feb 27, 2016

If you got the serial number right the lens was made between 1905 and 1910. This catalog http://www.cameraeccentric.com/html/info/zeiss_4.html recommends it for 10" x 12 " (24 cm x 30 cm), says it will cover 600 mm at small apertures.

claudius · Feb 27, 2016

thank you dan,
great information, i will keep the link, nice to have.
i might buy it, for use in my 20x24 with reduction for smaller plates.
thank you
klaus

Drew Bedo · Mar 10, 2016

I am a big fan of experiment.

Can you mount the lens on a LF camera? To test the coverage, any slap-dash rig that will hold the lens on the front standard and exclude most extraneous light will work. You just want to see if the image circle will cover the corners.

Cardboard and/or plywood with plenty of gaffer's tape will work, with a dark cloth to cover the gaps etc. Doesn't have to look pretty or even be practical, as long as you can focus at infinity with it.

Tessar Serie XIV1 1:4,5 F=50 cm coverage

claudius

Dan Fromm

claudius

Dan Fromm

claudius

Drew Bedo

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