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vivaldibow
Joined: 23 Jun 2018 Posts: 837
Expire: 2021-03-09
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Posted: Wed Jul 29, 2020 4:43 pm Post subject: Rainbow stripes in element |
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vivaldibow wrote:
I recently got Nikon 35mm f/2 non AI. The glass has haze which I think I might be able to clean.
However, there are also two to three rainbow stripes/arcs on the inner elements. This is the first time
I had these of all my lenses. Anyone know what they are? Separation between elements? Or oil on the glass?
Thanks!
Just did a quick search on the internet and found it is most likely separation. Will see how if affects the image. |
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visualopsins
Joined: 05 Mar 2009 Posts: 10543 Location: California
Expire: 2025-04-11
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Posted: Wed Jul 29, 2020 5:17 pm Post subject: |
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visualopsins wrote:
Can we see? _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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kds315*
Joined: 12 Mar 2008 Posts: 16544 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Wed Jul 29, 2020 6:00 pm Post subject: |
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kds315* wrote:
Sounds like separation, which only affects contrast by lowering it, sharpness will not be affected! _________________ 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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danfromm
Joined: 04 Sep 2011 Posts: 576
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Posted: Thu Jul 30, 2020 12:16 am Post subject: |
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danfromm wrote:
Klaus wrote:
Quote: |
Sounds like separation, which only affects contrast by lowering it, sharpness will not be affected! |
Klaus, it really depends. I have a 25-15 converter for my 25/1.4 Cine Ektar. Lovely thing, but the front group has strong Newton's rings all the way across. I've shot with it, got footage with rainbow strips.
vivaldibow wrote:
Quote: |
Will see how if affects the image. |
That's the spirit! Don't ask us what we think the lens will do, ask the lens.
Cheers,
Dan |
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kymarto
Joined: 30 Nov 2016 Posts: 406 Location: Portland, OR and Milan, Italy
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Posted: Thu Jul 30, 2020 12:33 am Post subject: Re: Rainbow stripes in element |
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kymarto wrote:
vivaldibow wrote: |
I recently got Nikon 35mm f/2 non AI. The glass has haze which I think I might be able to clean.
However, there are also two to three rainbow stripes/arcs on the inner elements. This is the first time
I had these of all my lenses. Anyone know what they are? Separation between elements? Or oil on the glass?
Thanks!
Just did a quick search on the internet and found it is most likely separation. Will see how if affects the image. |
Most probably generally not visible, except you may see in the defocused disks of point sources of light a slight darkening in the areas where the separation occurs. Hold the lens up and look through it at a plain light colored wall. Can you see the areas of separation as slightly darker than the rest of it. If so, those areas will show up as slightly darker in defocused circles, and more strongly the more in defocused circles caused by point sources of light. _________________ Vintage lens aficionado |
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aidaho
Joined: 29 Apr 2018 Posts: 456 Location: Ukraine
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Posted: Thu Jul 30, 2020 10:19 am Post subject: |
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aidaho wrote:
kds315* wrote: |
Sounds like separation, which only affects contrast by lowering it, sharpness will not be affected! |
There is one more possible affect: I have a lens on hand with bokeh butchered by separation. _________________ https://www.flickr.com/photos/curry-hexagon/ |
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stevemark
Joined: 29 Apr 2011 Posts: 3754 Location: Switzerland
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Posted: Thu Jul 30, 2020 1:36 pm Post subject: |
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stevemark wrote:
kds315* wrote: |
Sounds like separation, which only affects contrast by lowering it, sharpness will not be affected! |
danfromm wrote: |
Klaus, it really depends. I have a 25-15 converter for my 25/1.4 Cine Ektar. Lovely thing, but the front group has strong Newton's rings all the way across. I've shot with it, got footage with rainbow strips.
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The only lens I have showing separation is an Zeiss Opton Sonnar 2/85mm. Interestingly, there are two different separations:
1) in the front part: rainbow reflections from when looking from the front, only a slight darkening when looking from the back side (=film / sensor side).
2) in the back part: just a slight darkening when looking from the front side, but rainbow colored reflections when looking from the back (=sensor) side.
So in principle it seems that the rainbow colored reflections from the back element might pose a problem. However, there's probably not that much light reflecting from the sensor into the back element of the lens to make it a serious problem.
S _________________ www.artaphot.ch |
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jamaeolus
Joined: 19 Mar 2014 Posts: 2931 Location: Eugene
Expire: 2015-08-20
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Posted: Thu Jul 30, 2020 9:23 pm Post subject: |
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jamaeolus wrote:
I have a pentax 67 105mm 2.4 that developed separation whilst sitting in its case in my den. Discovered it when selling off most of my p67 kit. Decided that with the resale value reduced by it I would just keep it. Tested I to see what difference and I couldn't find any issues in the (small sample) of photos I took with it. _________________ photos are moments frozen in time |
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Teemō
Joined: 07 Apr 2016 Posts: 586 Location: Australia
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Posted: Fri Jul 31, 2020 10:56 am Post subject: |
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Teemō wrote:
I have a Topcor rangefinder lens which shows a green/pink alternating interference pattern across the cemented front group. The pattern is seen from reflected light whether from the front and rear. I have a Sigma with the same pattern on one of the doublets in the centre of the lens and based on the images from it, I don't think it affects the image quality at all. In both cases, the pattern goes across the entirety of the elements with equal spacing. Just, strangely, on the Sigma the pattern has corners at the edge - as in the lines are not perfectly parallel all the way across, they bend slightly towards the edge of the element. |
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vivaldibow
Joined: 23 Jun 2018 Posts: 837
Expire: 2021-03-09
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Posted: Sun Aug 02, 2020 4:26 am Post subject: |
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vivaldibow wrote:
Thanks very much everyone for your comments. I am attaching a picture showing the rainbow pattern and
a test photo taken with the lens. It is still pretty sharp. Contrast may be degraded by haze. Other
than that, I haven't really tested it. But overall, still very very usable. This lens collects nearly all the issues
that could happen to a vintage lens: haze, fungus, separation, schneideritis, choppy focus. Coming from Florida
weather, this is not unusual. Surprisingly, the front element doesn't have a single scratch. I can tell it used to be a
heavy user, which is a good thing.
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