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redidus
Joined: 15 Aug 2016 Posts: 5
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Posted: Mon Aug 15, 2016 12:46 pm Post subject: White area inside the lens, problem? |
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redidus wrote:
Hi
I've bought a zenit412, which has a zenitar m2s lens to start analog photography, so I'm a newbie.
Everything seems ok, except one thing, there is a kinda white area inside the lens, it's not on any of the glasses it's just on the edges, Here are some pictures:
As I said, it not on the glasses:
I just wanna know if it affects picture quality or not. Should I just ignore it?
In low light situations pictures tend to have low contrast, I wonder if this low contrast is caused by this?
Here are some photo samples that annoy me:
But during the daytime pictures look totally fine:
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kds315*
Joined: 12 Mar 2008 Posts: 16641 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Mon Aug 15, 2016 1:20 pm Post subject: Re: White area inside the lens, problem? |
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kds315* wrote:
redidus wrote: |
Hi
I've bought a zenit412, which has a zenitar m2s lens to start analog photography, so I'm a newbie.
Everything seems ok, except one thing, there is a kinda white area inside the lens, it's not on any of the glasses it's just on the edges, Here are some pictures:
As I said, it not on the glasses:
I just wanna know if it affects picture quality or not. Should I just ignore it?
In low light situations pictures tend to have low contrast, I wonder if this low contrast is caused by this?
Here are some photo samples that annoy me:
But during the daytime pictures look totally fine:
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Welcome here! As an anti-Spam measure, images do not show until you have few postings.
Please ise IMG buttom to embed images, not CODE _________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
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kds315*
Joined: 12 Mar 2008 Posts: 16641 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Mon Aug 15, 2016 1:22 pm Post subject: |
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kds315* wrote:
Yes, the black paint iside has deteriorated and it was there to catch stray light from lens surfaces.
Now that this is gone, this stray light causes lack of contrast. It would be best to re-blacken the
lens inside with special matte black lacquer. _________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
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John Shriver
Joined: 24 Dec 2009 Posts: 199
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Posted: Fri Aug 19, 2016 1:25 am Post subject: |
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John Shriver wrote:
Lens elements with thick edges have those edges ground to a matte finish, and then painted with flat black paint. These look like they were ground pretty coarsely, and may never have been very well painted. Quality control wasn't a big thing in the Soviet Union factories.
The elements certainly could be removed, cleaned, and repainted. But they really aren't a "first order" effect on lens contrast. The image forming light doesn't go through that part of the lens, and only rather oblique rays would ever hit the edges and reflect back in as glare.
Your night shots appear to suffer more from under-exposure than problems with lens contrast. |
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Lloydy
Joined: 02 Sep 2009 Posts: 7788 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Fri Aug 19, 2016 3:09 pm Post subject: |
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Lloydy wrote:
Schneideritis.....explained simply by Markus Keinath.
http://www.4photos.de/camera-diy/Schneideritis.html
. _________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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redidus
Joined: 15 Aug 2016 Posts: 5
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Posted: Sun Aug 21, 2016 9:37 pm Post subject: |
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redidus wrote:
Thanks everyone.
It was really easy to open this lens, I managed to make the situation a little better.
However, I bought a new lens (Helios 44m-5), I will probably use this new lens from now on, It was pretty cheap(around 15 dollars). I'm waiting to finish a new roll of film to see what the pictures will look like.
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redidus
Joined: 15 Aug 2016 Posts: 5
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Posted: Wed Aug 24, 2016 12:19 pm Post subject: |
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redidus wrote:
I've finished a roll of film and I guess this black paint problem wasn't really the cause of whitish pictures, as john said under exposure seems to be the problem, I've shot some photos with 1/30 shutter speed and they look great. Even the new helios lens seems to take whitish pics with shutter speeds faster than 1/60(in low light situations), although the black painting looks fine.
So I guess I should work on taking steady pictures with slow shutter speeds instead of blaming the lens, zenitar m2s takes reaaally sharp photos, I like it a lot more than helios |
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480sparky
Joined: 16 Apr 2013 Posts: 355 Location: Iowa
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Posted: Sat Aug 27, 2016 5:00 pm Post subject: |
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480sparky wrote:
I suspect your low-contrast results in low-light situations is due to underexposure. |
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Lightshow
Joined: 04 Nov 2011 Posts: 3666 Location: Calgary
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Posted: Sun Aug 28, 2016 6:38 am Post subject: |
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Lightshow wrote:
Schneideritis Seems more like bubbles forming between the paint and glass, this lens looks like it has no paint, as long as the surface is not smooth, any black paint should work suitably well, a felt pen can even do the job. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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