DanK
11-Sep-2010, 09:46
Might anyone have experience with the B&L Lens on the left...and deciphering reflections....
I have the two, and the one on the right (to me) is typical of the B&L projection type lens....it's a Triplet, the complete interior assembly comes out, has the single up front, and two lenses air spaced in the rear....
The one on the left has me stumped....it only has two threaded cells front and back....also B&L but with brass, sn 1416xxx...
I've been trying to figure out the reflections, but have no clue with figuring cells or types from the reflection....
The front lens I see three reflections - one main mirrored reflection on front surface and a second slightly smaller, then one much smaller....
The back lens I see one main large mirror reflection from surface then, another medium sized reflection, and two small reflections....
Do you count the main mirrored reflection, or just look at the smaller ones?
Is this lens a triplet as well? beyond triplets and petzvals, were other types of projection lenses made?
Edit - The one on the right reads 12 in. E.F. - but the other only reads 10 in. (without the EF)
Thanks in advance,
Dan
I have the two, and the one on the right (to me) is typical of the B&L projection type lens....it's a Triplet, the complete interior assembly comes out, has the single up front, and two lenses air spaced in the rear....
The one on the left has me stumped....it only has two threaded cells front and back....also B&L but with brass, sn 1416xxx...
I've been trying to figure out the reflections, but have no clue with figuring cells or types from the reflection....
The front lens I see three reflections - one main mirrored reflection on front surface and a second slightly smaller, then one much smaller....
The back lens I see one main large mirror reflection from surface then, another medium sized reflection, and two small reflections....
Do you count the main mirrored reflection, or just look at the smaller ones?
Is this lens a triplet as well? beyond triplets and petzvals, were other types of projection lenses made?
Edit - The one on the right reads 12 in. E.F. - but the other only reads 10 in. (without the EF)
Thanks in advance,
Dan