kennylovrin
Well-known
Hey guys
I have a 35mm C Biogon that I bought used - really happy with it overall.
However, when I got the M9 I looked into what lens coding to use, but it seemed from reading online that one wasn't really needed.
However, I get some color shifts with this lens that I don't know if it is a sign of something wrong with the lens, or if it needs to be coded, or even accepted and adjusted in post.
Anyway, the shifts I have aren't really in the corners like a vignette would be, but rather along the full sides of the shot. It looks very consistent as well.
If I shoot in landscape, the left side of the frame shifts towards magenta from top to bottom, while the right shifts from green.
If I shoot in portrait then for some strange reason the color shifts are reversed (green on left, magenta on right).
The color shifts looks like magenta and green from CA, I mean it's the same kind of tone/tint. This kind of leads me to believe that the lens is in fact not perfectly aligned?
Any ideas regarding this?
Thanks!
Kenny
I have a 35mm C Biogon that I bought used - really happy with it overall.
However, when I got the M9 I looked into what lens coding to use, but it seemed from reading online that one wasn't really needed.
However, I get some color shifts with this lens that I don't know if it is a sign of something wrong with the lens, or if it needs to be coded, or even accepted and adjusted in post.
Anyway, the shifts I have aren't really in the corners like a vignette would be, but rather along the full sides of the shot. It looks very consistent as well.
If I shoot in landscape, the left side of the frame shifts towards magenta from top to bottom, while the right shifts from green.
If I shoot in portrait then for some strange reason the color shifts are reversed (green on left, magenta on right).
The color shifts looks like magenta and green from CA, I mean it's the same kind of tone/tint. This kind of leads me to believe that the lens is in fact not perfectly aligned?
Any ideas regarding this?
Thanks!
Kenny
Last edited:
kennylovrin
Well-known
Going through todays shots I just found one where the problem is very easy to see:
This example is slightly worse than what is usually visible as this image is quite uniform in color, but still, any ideas what I am dealing with here?
This example is slightly worse than what is usually visible as this image is quite uniform in color, but still, any ideas what I am dealing with here?
FrozenInTime
Well-known
21mm or 35mm C Biogon ?
The 21mm version has obvious gren/maganta edge color shift - I normally crop it to square on the M9 in order to avoid shifts.
I don't think I've used the 35mm C-Biogon on my M9 yet.
There is a Adobe DNG flat field plug in that should help - but not tried it yet. http://labs.adobe.com/technologies/lightroomplugins/
The 21mm version has obvious gren/maganta edge color shift - I normally crop it to square on the M9 in order to avoid shifts.
I don't think I've used the 35mm C-Biogon on my M9 yet.
There is a Adobe DNG flat field plug in that should help - but not tried it yet. http://labs.adobe.com/technologies/lightroomplugins/
kennylovrin
Well-known
Oh sorry, it's the 35mm.
I might give corner fix a go as well, but I wanted to ask if others with this lens has the same problem or if mine is off.
I might give corner fix a go as well, but I wanted to ask if others with this lens has the same problem or if mine is off.
jaapv
RFF Sponsoring Member.
Yes, the camera can produce the socalled Italian Flag syndrome with non-Leica lenses. Often coding as an equivalent Leica lens can help. Otherwise Capture One has an LCC profile option that provides an easy one-click correction.