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VPooler
16-Mar-2014, 06:28
Hello!

I just recently got my filthy hands on a beast of a lens - Apo-Germinar 360/9. Came with a flange and all. What can you tell me about this lens? It seems to cover a LOT!

Edit: How much do I have to move the lens to focus from infinity to lets say - a meter and a half?

Vallo

Ken Lee
16-Mar-2014, 07:25
See http://www.kenleegallery.com/html/tech/bellows.php

1/F = 1/D + 1/B
where F = focal length, D = distance, B = Bellows Draw

Given a 360mm lens and 1500mm distance how much bellows draw is required ?

F = 360mm, D = 1500mm

1/360 = 1/1500 + 1/B
1/B = 1/360 - 1/1500
1/D = 0.0027 - 0.0007
1/D = 0.002
D= 500

Bellows Draw = 500mm

andrehh
16-Mar-2014, 07:26
Hello!

I just recently got my filthy hands on a beast of a lens - Apo-Germinar 360/9. Came with a flange and all. What can you tell me about this lens? It seems to cover a LOT!

Edit: How much do I have to move the lens to focus from infinity to lets say - a meter and a half?

Vallo

Hi Vallo,

you can find a PDF on the website of Arne Croell http://www.arnecroell.com/publications showing technical details of all Zeiss Jena lenses.

Image circle for your lens is 596mm at f22 and 1:1 scale

VPooler
16-Mar-2014, 07:49
Thanks!

The required bellows draw puts me off a bit but I'll figure something out.