Hello,
Since not so long I have a Hermagis casket lens - and am now looking for information on how to assemble it Besides my empirical approach of just checking which elements and which element combinations produce nice images - are there any rules I should know about?
The lens consists of a brass barrel, 6 elements and 8 Waterhouse stops. The elements are as follows:
3 elements with a brass shade of 6mm, marked as follows:
* Apl N° 5 bis
* G.A. N°5
* G.A. N° 6
and 3 elements all black without shade:
* Apl N° 5 bis (identical to the other one, except for the missing shade)
* Apl N° 7
* G.A. N° 7
The Waterhouse stops are marked as follows:
1, 1⅓, 4, 8, 16, 32, 64, 256
Now: I guess that "Apl" means Aplanat - but what does "G.A." stand for? Which elements are (likely) to be mounted in the front, which ones in the back? Which ones are (likely/unlikely) to be mounted in pairs? And which ones are (likely/unlikely) to be used alone?
Thanks!
/c
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