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BurstMox
Joined: 04 Dec 2011
Posts: 1998
Location: France
Expire: 2016-08-02
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 Posted: Fri Sep 13, 2013 10:31 am Post subject: Problem with coating? Jupiter-6 |
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BurstMox wrote:
Hello,
I just received this item, and I noticed weird thing on the rear glass :
http://www.youtube.com/watch?v=wzGOjzNpXDo&feature=youtu.be
What are those "triangles"? I didn't have time to test it, but I wanted to have your opinion about this thing.
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Pierre
sovietlenses.fr
Soviet lenses Facebook group |
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Oldhand
Joined: 01 Apr 2013
Posts: 6008
Location: Mid North Coast NSW - Australia
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| Posted: Fri Sep 13, 2013 10:36 am Post subject: |
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Oldhand wrote:
Yes, it looks like a deterioration of the original coating.
Shouldn't be anything to worry about I would think.
Test it and see.
Cheers
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Fri Sep 13, 2013 11:04 am Post subject: |
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DR.JUAN wrote:
If you have not another same lens to compare with, you shoul never know the real iq of the lens |
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BurstMox
Joined: 04 Dec 2011
Posts: 1998
Location: France
Expire: 2016-08-02
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| Posted: Fri Sep 13, 2013 3:34 pm Post subject: |
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BurstMox wrote:
Yes, I don't have another J-6...
Today we have very bad weather for photos, I just made a few try. Looks ok to me... pity that I can't see how it react to bright sun (but good that I have a hood)
Straight from the cam...
#1
#2
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Pierre
sovietlenses.fr
Soviet lenses Facebook group |
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Jeff Zen
Joined: 17 Jun 2009
Posts: 262
Location: Northwest USA
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| Posted: Fri Sep 13, 2013 5:53 pm Post subject: |
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Jeff Zen wrote:
Hmmm....never seen those triangles before. Your images look great though! Looks like a keeper to me. I have so many lenses with flaws of one kind or another that are wonderful. I wouldn't worry unless the triangles affect the image somehow in bright sun. |
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Drack
Joined: 27 Feb 2011
Posts: 735
Location: Lithuania
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| Posted: Fri Sep 13, 2013 8:19 pm Post subject: |
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Drack wrote:
Do not worry, those spots on the coating are simply a bad example of factory work. Some lenses have these coating spots on them and it is very common in the Russian arsenal. It should not pose any threat to the quality.
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Forum members are olbigaded to a discount 
DSLR: Pentax K-x + 18-55 kit + f4 35-75mm
Mirrorless : Samsung NX-20 + 18-55 kit
M42 lense: Helios 44-2 , Helios 44-3, Helios 44m , Tair 3 Phs , Mir-1B , Jupiter-37a, Industar 50-2, Industar 61 L/Z, Tlear-N .
Currently using:
Minolta X-700 + MD f1.7/50mm + Rokkor-X f2.8/28mm + MD f3.5 35-70mm MACRO
Zorki-4K + J-8 f2/50mm + J-12 f2.8/35mm
EXA 1A + CZJ Tessar f2.8/50mm |
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Webwalker
Joined: 09 Jan 2012
Posts: 96
Location: Bishkek, Kyrgyzstan
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| Posted: Sat Sep 14, 2013 12:51 am Post subject: |
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Webwalker wrote:
Coating damage on the rear element may apear on bokeh circles. Wide open aperture, focus to minimal distance then shot some kind of lamp. If there are no triangles on bokeh circles then ok. But even if they are present on the picture it is not evident usually.
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Sony SLT A58
MF: Mir-1 silver GP Brussels, Zenitar-M 1.7/50, Helios 44 silver, Indi 50-2, Jupiter 38 4/75, MC CZJ Biometar 2.8/80, Jupiter 11 crome, MC Tamron SP 28-80mm f/3.5-4.2, Vivitar 75-205 mm f/3.8
AF: Minolta AF 50mm 1.7, mini beercan, beercan, secret handshake, Sigma Tele Converter X1.4 |
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