eBay

Here is a very rare Carl Zeiss Jena Orthometar f4.5 20.5cm T large format lens. From research it looks like this rare lens was originally used as an aerial lens. I found 3 others in my search on the Internet and all three were just the front section of the lens like this one. I read that the elements could be used separately and this one does have a focal length of approx 10 1/2". It covers 8x10 as well. This one comes nicely mounted in an early brass lens barrel. The diaphragm works fine. The glass is clean and clear showing some wear and internal dust. It does not come with a flange. A great lens to add to ones collection. Check out my other auctions for more large format early brass lenses and cameras. Buyer pays shipping and the shipping quote includes insurance.