Prosaic
Well-known
Could someone confirm, is this the way the coating on the lens is supposed to look? What you see is a new copy of the CV 35/1.4 (MC).
Coating gone wrong? (CV 35/1.4)
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martin s
Well-known
I can't reproduce those rings with the f1.4 MC.
martin
martin
Prosaic
Well-known
Thats how it actually looks. Nothing to do with the taking lens.
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aad
Not so new now.
Since they follow the aperture, and they have a rainbow color, it may be lightbands, not an actual coating coloration. Can you see them if you put the lens on paper, or straight on?
ItsReallyDarren
That's really me
Could the light source and or its distance/angle from the lens be a factor in the rainbow effects on the lens?
antiquark
Derek Ross
A possible hypothesis is that the coating is slightly thicker in the center, and what you're seeing are Newton's rings from the surface of the coating.
(Just a guess though.)
(Just a guess though.)
antiquark
Derek Ross
This looks like it may be the same effect you're seeing:
http://photo.net/large-format-photography-forum/00KrTP
http://photo.net/large-format-photography-forum/00KrTP
Prosaic
Well-known
Upon closer inspection and after talking to Tom A by PN this appears to be an issue of lens separation or de-cementation (I´m no expert here). There is a small scratch on the front element right under the Voigtländer "I G" I havent seen before which may be the cause.
Will ask for a replacement.
Will ask for a replacement.
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Jason Sprenger
Well-known
I see flecks on the coating that don't appear normal to me.
As to the "rings", I have noticed a similar effect with my copy of this lens when I look at the it in the light of a compact fluorescent lamp. Under an incandescent lamp, the rings do not appear to me. It is curious that I have only seen these rings with the CV 35/1.4 MC.
I wonder if others have noticed this effect also.
As to the "rings", I have noticed a similar effect with my copy of this lens when I look at the it in the light of a compact fluorescent lamp. Under an incandescent lamp, the rings do not appear to me. It is curious that I have only seen these rings with the CV 35/1.4 MC.
I wonder if others have noticed this effect also.
MikeL
Go Fish
Looks kinda like thin-film interference from an air gap. Can you tell if the rings are generated on the outer surface?
Jason Sprenger
Well-known
It seems like the pattern is on the outer surface, like a sheen that changes as the lens is moved in the light.
Perhaps the narrow spectrum of the fluorescent light and the nature of the lens and/or the lens coating causes the effect to be noticeable where it wouldn't be under light involving a broader spectrum of light frequencies.
Perhaps the narrow spectrum of the fluorescent light and the nature of the lens and/or the lens coating causes the effect to be noticeable where it wouldn't be under light involving a broader spectrum of light frequencies.
MikeL
Go Fish
I think you are right, fluorescents tend to emit more strongly at distinct wavelengths. Kinda cool. If you have a compact fluorescent versus a tube, you'd expect the pattern to change some.
Prosaic, when I first read the initial post I thought you were referring to these marks below rather than the "rings". I have a Nokton 35/1.4 MC too, and when I first purchased it and noticed the rings I thought there may have been something wrong with the coatings as well. However, I checked a few other samples in a shop and they were all the same. So I stopped worrying about and shot some film. No problems whatsoever so far. I've also noticed that my ZM Planar 50/2 has similar rings but to a lesser extent. No problems with it, either.
Here's some pics of my lens. Same funky rings. No problems with any images whatsoever 🙂
khadgar_959
Established
this only happens when you take your pic using artifical light source
it will not appear when you use sunlight
it will not appear when you use sunlight
popeye
Established
I think I will discard the pics I took to post on this matter and go out and just shoot. Problem solved, thank you Jon.
ampguy
Veteran
Does the SC version of the 35/1.4 also have these rings?
RichA
Member
It is delamination of two cemented elements
It is delamination of two cemented elements
Definitely. They need to be removed, the cement stripped and the elements re-cemented.
It is delamination of two cemented elements
Definitely. They need to be removed, the cement stripped and the elements re-cemented.
Not true. The "rings" are an optical effect caused by an incandescent light, and as you'd expect they "move around" on the glass surface as you move the lens in relation to the artificial light source.
ampguy
Veteran
:: going to check kitty under fluorescent lights only to make sure he really is striped ::
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