found this on ebay, jena 1000mm f12 what format is this ?

[KarelDH]

hi was just wondering for what these lenses are used ?

http://www.benl.ebay.be/itm/Rare-Carl-Zeiss-Jena-DDR-Apo-germinar-12-1000-mm-etat-exceptionnel-/170876464530?pt=LH_DefaultDomain_23&hash=item27c907ed92

ty

[luisalegria]

It may be a process lens, used on a large process camera. Some of these things were room-sized.

It should be usable as a large format long lens on any of the usual formats (though it would require a lot of bellows), or as a "normal" on a particularly large camera.

The Germinars seem to have had about 70-degree coverage so at infinity I guess it could work on 20x24

[danfromm]

look here: http://www.arnecroell.com/publications