1930s tessar lens coatings
Dec 23, 2018 22:28:09 #
Purelightglow
Loc: High plains
It looks like a multicoated lens contrast level. Is this the same as other tessars? The lens is a 1930s Carl Zeiss Jena Tessar f:6.3 f=15cm. It looks like ones I've seem on bellows cameras (6x6?) but is on a matching brass focus helicoid with m42 mount from the same manufacturer. It needs work the iris is so stiff to turn I hurt my hand using it on this cold day. The photos were taken on my canon dslr
Dec 24, 2018 06:51:48 #
Might be single coated. Low lens element count helps - I have an uncoated large format lens (Artar) that works very well.
Dec 24, 2018 08:28:18 #
AFAIK, pre-War LEITZ lenses were NOT coated ... so, I would presume the same is true for pre-War ZEISS lenses.
Dec 24, 2018 08:45:34 #
I had one in my Rolleiflex that was single coated. I bet your is not coated.
Dec 24, 2018 12:31:02 #
Do coatings on lenses give something for fungus to " live " on ? I've got an old nikon lens with no fungus & plenty of newer lenses with fungus inside. By the way I live in a high humidity climate. Thanks in advance for your answers.
Dec 24, 2018 13:25:05 #
Don.Y wrote:
Do coatings on lenses give something for fungus to " live " on ? I've got an old nikon lens with no fungus & plenty of newer lenses with fungus inside. By the way I live in a high humidity climate. Thanks in advance for your answers.
Uncoated lenses also get fungus
Dec 24, 2018 14:58:47 #
Many years ago, I was informed by my photographer-photo-columnist Brooklyn Heights neighbor David B. Eisendrath, Jr. (Pop Photo's "Color Clinic") that the f/6.3 Tessar was quite different from the F/4.5 Tessar. The difference wasn't sharpness, he explained -- all Tessars are famously sharp -- but the larger image circle that allowed view camera movements. I doubt this will make much difference of a DLSR but it's nice to know.
Merry Christmas!
Merry Christmas!
Dec 24, 2018 17:57:41 #
No coated lenses till mostly post-war. Uncoated lenses, over time, can grow a "bloom" that looks similar to a coating ....
Dec 24, 2018 19:32:21 #
wrangler5
Loc: Missouri
alfeng wrote:
AFAIK, pre-War LEITZ lenses were NOT coated ... so, I would presume the same is true for pre-War ZEISS lenses.
I believe my father told me that his Leitz 50mm/3.5 collapsible Elmar was originally not coated, but that at some point after WWII he sent it off and had it coated. Presumably that service was available for Zeiss lenses as well.
Dec 24, 2018 22:07:56 #
Purelightglow
Loc: High plains
scg3 thank you - good to know. I have wondered what cameras this lens has been used on, the obvious being on m42 adaptable 35mm film and a mention of its movie camera history. I think the build won't support the full image circle for medium or larger, but I will try.. tilt and bellows with the glass.
wrangler5 Yes that's what I was thinking, that it could have more than original coatings tho I'm satisfied with the explanation of low refraction in less glass produces minimal flare
wrangler5 Yes that's what I was thinking, that it could have more than original coatings tho I'm satisfied with the explanation of low refraction in less glass produces minimal flare
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.