Every time i say to myself, i have to stop collecting stuff, but this one i couldn't resist......
The lens is dated between 1850 - 1860 so more than 150 years old.
A beautiful example of perfect handcraft.
The bayonet system makes this a rapidly convertible portrait/landscape lens.
The lens has a focal length of about 8" and it's speed is about f 3.8
unfortunately it has no flange, so if somebody could help me finding one i would be more than grateful !
Thread diameter is 88,6 mm.
I made you some pictures to show how the ingenious lens works.
One for the portrait lens and a smaller one for the land scape lens