Avotius
Some guy
I have found something odd going on with two lenses I have, both made by Cosina, my Voigtlander 35mm pancake II and Zeiss 50 Planar.
If you watch the news you know that China is going through a very odd cold spell, snow in places where there have not had any for nearly half a century and so on. Anyway my Voigtlander and Zeiss lens seem to be getting stiffer and stiffer to focus as the temperature goes down. This is quite strange as I never had this problem with any other lens I had.
Wondering if anyone else has encountered this?
My cv 35mm lens when I got it was firm but loosened up nicely but now has firmed up again. I have had it for about a year. I bought it when it was coldish, not this cold mind you, and then after a month or two it loosened up nicely, coincidently when the weather warmed up a bit? Not that drastic I think. But there was a 30C difference in the winter and summer last year.
Then I got my Zeiss 50 planar, I got that when the temperature was pretty toasty right in the summer. 40 C days are common then, the focus on that lens was firm as well, but seemed to loosen slightly but always seemed too firm and now it is even more firm it seems. My Leica 50 Elmar 3.5 seems ok, but it was never completely smooth (needs to be relubed). My other lenses all seem to be fine though, no noticeable firming up to be found on anything else, even the old zeiss 50 Distagon and 150 Sonnar lenses on the hasselblad feel the same and who knows when they were last looked at.
Maybe the lube Cosina uses does not care for the cold much?
If you watch the news you know that China is going through a very odd cold spell, snow in places where there have not had any for nearly half a century and so on. Anyway my Voigtlander and Zeiss lens seem to be getting stiffer and stiffer to focus as the temperature goes down. This is quite strange as I never had this problem with any other lens I had.
Wondering if anyone else has encountered this?
My cv 35mm lens when I got it was firm but loosened up nicely but now has firmed up again. I have had it for about a year. I bought it when it was coldish, not this cold mind you, and then after a month or two it loosened up nicely, coincidently when the weather warmed up a bit? Not that drastic I think. But there was a 30C difference in the winter and summer last year.
Then I got my Zeiss 50 planar, I got that when the temperature was pretty toasty right in the summer. 40 C days are common then, the focus on that lens was firm as well, but seemed to loosen slightly but always seemed too firm and now it is even more firm it seems. My Leica 50 Elmar 3.5 seems ok, but it was never completely smooth (needs to be relubed). My other lenses all seem to be fine though, no noticeable firming up to be found on anything else, even the old zeiss 50 Distagon and 150 Sonnar lenses on the hasselblad feel the same and who knows when they were last looked at.
Maybe the lube Cosina uses does not care for the cold much?
