Anyone familiar with this marking? Did Gasc and Gilmer get together and make a lens?
Thanks,
Dan
IMG_2779 by Fotoguy20d, on Flickr
Anyone familiar with this marking? Did Gasc and Gilmer get together and make a lens?
Thanks,
Dan
IMG_2779 by Fotoguy20d, on Flickr
I doubt it!
But, I read it as 505 (millmeters) equi (valent focal length) - which you can check now.
It is indeed a 20" FL - I had already confirmed that (once I overcame my surprise at finding it wasnt 10" f4-ish). At infinity on an 8x10 2-D:
IMG_2780 by Fotoguy20d, on Flickr
Thanks,
Dan
The use of equivalent focal length (EFL) suggests UK origin and GG is someone called George Grant (or similar).
Steve,
Thanks. A quick perusal of the VM didn't turn up any likely candidates. Just one of the many lens makers around turn of the century I suppose.
Dan
Wouldn't the 'accent aigu' over the 'e' rule out an English manufacturer? Besides the accent, 'equivalent' and 'équivalent' are ,well, equivalent in spelling and meaning, though pronunciation is different. I don't see why an English manufacturer would affect a French spelling, nor have I ever seen such in period English literature.
Yes I see - but the "smudge" is over the q rather than the e! Or does accepted French handwriting allow/promote this displacement?
Perhaps a few shots of the meniscus lens out of the universal iris clamp would help.
This sort of straight barrelled meniscus lens was popular in the UK (Dallmeyer, TTH and Wray - I have a 30" one), whilst French lenses are often more traditional pill-box affairs.
Steven,
Sorry for the lack of clarity on the original post. It's a garden variety (albeit very long) projection petzval. The larger rear glass has the same marking as the front. Any marking that might have been on the outer barrel is unfortunately lost.
Thanks,
Dan
IMG_2789 by Fotoguy20d, on Flickr
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