Mr Scorpio
Newbie
Is this normal?
ferider
Mentor
It's not normal, but shouldn't affect performance.
Some-times, separation looks like this, but I believe in this case it's just irregular coating thickness. Had it once on the rear element of a 40 Summicron, too, BTW.
Some-times, separation looks like this, but I believe in this case it's just irregular coating thickness. Had it once on the rear element of a 40 Summicron, too, BTW.
Mr Scorpio
Newbie
Thanks for the quick reply, feeling a little better.
sanmich
Mentor
Is the lens brand new?
Mr Scorpio
Newbie
Yes. 10char.
Mr Scorpio
Newbie
Would it be worth getting it replaced?
ferider
Mentor
I would to keep resale value. And so that they (CV) know.
Jason Sprenger
Well-known
I've seen this appearence under the flourescent "twisty" bulbs. Could that be the case here?
Mr Scorpio
Newbie
Your exactly right, I took it outside & there was no sign of it.
Still a little strange that none of my other lenses have the same effect under fluro light though.
This is normal for this lens under certain light. There's no effect on the photos.
Also check out this thread.
Also check out this thread.
Keith
The best camera is one that still works!
Looks like the 'Gulf oil slick!'
I'd be asking for a replacement ... but maybe as Jon says it's normal?
I'd be asking for a replacement ... but maybe as Jon says it's normal?
Mr Scorpio
Newbie
Ah thanks for that link, cleared things right up.
ampguy
Mentor
interesting. can't replicate that effect with incandescent or cfl's with Leica or M-Hexanon lenses.
coelacanth
Ride, dive, shoot.
Your lens got BP'ed.
Sorry I had to say that. I can't replicate that with my CV lens, but I've seem similar to that before under certain light condition although it was as pronouncing as your photo.
Phil_F_NM
Camera hacker
That effect is just from the coating. If it were separation, you'd be able to see tiny, ripply, crackly edges in the adhesive if you shone a light through it. The light is being reflected back within the thickness of the coating and scattered according to the different wavelengths of light which are being emitted by your bulb. Usually it's more apparent under lights with narrower band emissions like flourescent bulbs or some of the higher output lights with very narrow band emissions. Some would return more of one color and little or none of others.
And regarding the oil slick comments, yes, this is exactly the same reason that an oil slick looks this way or a bubble with a prismatic effect. The wave is interfered and reflected inside the film of oil or soap according to the thickness of the film matching or being an exact multiple of the wavelength of light.
Phil Forrest
And regarding the oil slick comments, yes, this is exactly the same reason that an oil slick looks this way or a bubble with a prismatic effect. The wave is interfered and reflected inside the film of oil or soap according to the thickness of the film matching or being an exact multiple of the wavelength of light.
Phil Forrest
thomasw_
Well-known
If it is new, I'd ask the place from which you bought it about a replacement. if not everyone can duplicate the rings under your conditions, then it means there is something off about your sample. Replace it and enjoy this very fine lens in peace of mind 
hans voralberg
Mentor
It wont do any harm, my lens is exactly the same
My Zeiss Planar also does something similar.
Keith
The best camera is one that still works!
My Zeiss Planar also does something similar.
That's interesting ... when I first got my ZF Planar I noticed that wacky pattern when looking into it and immediately took it off the camera and held it up to the light ... crystal clear!
Put it back on the camera and it looked fogged again. The mirror in an SLR really sets it off for some reason!
Mister E
-
It's completely normal. These also are not newton rings...