Attention! For your device is available official mobile app "All Photo Lenses" from AllPhotoLenses.com.
Download it and you will be able to work with the lens database is much faster and easier.
Not now Details
Carl Zeiss APO Sonnar T* 4/1700 is ultralong telephoto prime lens.
The Focal-Length is 1700mm! But i could only choose 1500 on the selection box for focal length.
Designed as an individual item for an unknown costumer.