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Ema90
Joined: 13 Oct 2012
Posts: 28
Location: Italy
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 Posted: Tue Jan 14, 2014 5:09 pm Post subject: Defective lens? |
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Ema90 wrote:
Hello , testing my "new" Ais Nikkor 28mm f2.8 on a Samsung NX1100 camera I've noticed a blurred area in the left part of the APSC frame .
This shot was made at f2.8
Right 100%
Center 100%
Left 100%
This blurring is visible also at f5,6 and f8 , can it be the adapter or the UV filter? |
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Excalibur
Joined: 19 Jul 2009
Posts: 5017
Location: UK
Expire: 2014-04-21
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| Posted: Tue Jan 14, 2014 5:25 pm Post subject: |
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Excalibur wrote:
Well for a start, can you take shots without the UV filter and see if you get the same results 
_________________
Canon A1, AV1, T70 & T90, EOS 300 and EOS300v, Chinon CE and CP-7M. Contax 139, Fuji STX-2, Konica Autoreflex TC, FS-1, FT-1, Minolta X-700, X-300, XD-11, SRT101b, Nikon EM, FM, F4, F90X, Olympus OM2, Pentax S3, Spotmatic, Pentax ME super, Praktica TL 5B, & BC1, , Ricoh KR10super, Yashica T5D, Bronica Etrs, Mamiya RB67 pro AND drum roll:- a Sony Nex 3
.........past gear Tele Rolleiflex and Rollei SL66.
Many lenses from good to excellent. |
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visualopsins
Joined: 05 Mar 2009
Posts: 10959
Location: California
Expire: 2025-04-11
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| Posted: Tue Jan 14, 2014 5:35 pm Post subject: |
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visualopsins wrote:
Doubtful UV filter is to blame...
Could be adapter, or lens problem, unless lens is known good on another camera, without using adapter. 
_________________
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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-A 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 (151B), 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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Ema90
Joined: 13 Oct 2012
Posts: 28
Location: Italy
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| Posted: Tue Jan 14, 2014 6:41 pm Post subject: |
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Ema90 wrote:
| visualopsins wrote: |
Doubtful UV filter is to blame...
Could be adapter, or lens problem, unless lens is known good on another camera, without using adapter. |
With my D7000 seem to work perfectly at closer distance , tomorrow I will try to make more serious test.
Thanks all for advices. |
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norland
Joined: 10 Aug 2013
Posts: 165
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| Posted: Tue Jan 14, 2014 6:46 pm Post subject: |
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norland wrote:
Use the camera upside down and see if the blur changes sides. |
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philslizzy
Joined: 07 Aug 2012
Posts: 4744
Location: Cheshire, England
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| Posted: Tue Jan 14, 2014 7:51 pm Post subject: |
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philslizzy wrote:
There is strong CA on the 'blurred' side so in my opinion its the lens. not necessarily a faulty one.
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Hero in the 'messin-with-cameras-for-the-hell-of-it department'. Official. |
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flaviomaia
Joined: 15 Jan 2013
Posts: 120
Location: Portugal
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| Posted: Wed Jan 15, 2014 12:56 am Post subject: |
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flaviomaia wrote:
I had a similar issue in the past with all wideangles fitted on my Nikon D80 and it turned out the problem was the plate (or something) which holds the sensor was broken and the sensor wasn't parallel with the mount.
Also I had the same issue with a cheap adaptor to my Nex. I unscrewed the mount and sanded a bit the adaptor tube where the mount goes and now it is much better.
In both cases the problem was visible (almost) only with wideangles.
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Flávio Maia
Digital: Nikon D300, D80, Sony Nex-5N, A7II
Film: Mamiya 645, Nikon F, FM, FE, EM, Nikkormat FTN, Pentax Soptmatic SPII, Zorki-S, Kiev 4...
Lenses: a few nikkors, a few soviets and a couple of mamiyas |
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