Welcome everyone,
I just became the owner of this lens: HERMAGIS 440mm Aplanat No.4 Series II. // Serial number: 36070 //
I have only one problem with it, on the lens iris - instead of the aperture markings I have the number markings
1
2
4
8
16
32
64
What aperture corresponds to these numbers?
It is difficult for me to determine whether I should use the US or French measure
How can you check it?
Someone told me that the initial f value of my lens should be: focal lenght divided by the diameter.
In my case it will be: 440mm / 60mm (about) = 7,33
So should I assume that my lens start from f/8 and this is French system?
Best
Lukasz
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