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ellepi
Joined: 07 Aug 2010
Posts: 486
Location: Treviso - Italia
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 Posted: Sat Sep 08, 2012 4:26 pm Post subject: Question about fisheye |
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ellepi wrote:
Hallo,
Yesterday is arrived the Mamiya Sekor C 24/4 ULD fisheye.
Can anyone tell me what's that circular sign that you see inside the lens?
Thank you
Luca
_________________
M42 | Super Takumar 20/4, 28/3.5, 35/3.5, 55/1.8, 105/2.8, 135/3.5, 200/4 - Tair-11A - Helios-44M - Mir-1B
K | Pentax M40/2.8, K 55/2, A 50/1.7, M 50/1.7, M 135/3.5 - Jupiter 37-AM
Micro nikkor 60/2.8
Mamiya 645 | Sekor 24/4, 55/2.8, 80/2.8, 210/4 |
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themoleman342
Joined: 21 Oct 2007
Posts: 2190
Location: East Coast (CT), U.S.A.
Expire: 2013-01-24
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| Posted: Sat Sep 08, 2012 4:30 pm Post subject: |
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themoleman342 wrote:
Looks to me like maybe a degradation of the black sidewall paint; the paint used to coat the outer edge of the elements. A similar breakdown can been seen in the Flektogon 4/50. |
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ellepi
Joined: 07 Aug 2010
Posts: 486
Location: Treviso - Italia
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| Posted: Sat Sep 08, 2012 4:31 pm Post subject: |
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ellepi wrote:
I hope it will not affect the picture 
_________________
M42 | Super Takumar 20/4, 28/3.5, 35/3.5, 55/1.8, 105/2.8, 135/3.5, 200/4 - Tair-11A - Helios-44M - Mir-1B
K | Pentax M40/2.8, K 55/2, A 50/1.7, M 50/1.7, M 135/3.5 - Jupiter 37-AM
Micro nikkor 60/2.8
Mamiya 645 | Sekor 24/4, 55/2.8, 80/2.8, 210/4 |
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ForenSeil
Joined: 15 Apr 2011
Posts: 2726
Location: Kiel, Germany.
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| Posted: Sat Sep 08, 2012 6:14 pm Post subject: |
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ForenSeil wrote:
I think themoleman is right.
As long as it's no lens seperation it will only lower the contrast very slightly. Nothing to worry much about.
_________________
I'm not a collector, I'm a tester 
My camera: Sony A7+Zeiss Sonnar 55/1.8
Current favourite lenses (I have many more):
A few macro-Tominons, Samyang 12/2.8, Noritsu 50.7/9.5, Rodagon 105/5.6 on bellows, Samyang 135/2, Nikon ED 180/2.8, Leitz Elmar-R 250/4, Celestron C8 2000mm F10
Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
My Blog: http://picturechemistry.own-blog.com/
(German language) |
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