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Chardin
Joined: 14 Dec 2017
Posts: 18
Location: Sweden
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 Posted: Sat Apr 27, 2019 1:06 pm Post subject: Sensor reflection |
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Chardin wrote:
Hi. Sometimes i´ve had sensor reflections when using my Auto Sears 55mm F1,4 M42 lens (and Sony A7 RII Camera). I tested to fix this with painting matte black paint on the back lens element. (se picture red marking). It seems to work but i have to do some more photo shooting. Have anybody tried anything similar ? I tried some black marker felt pen at first but the matte black paint seems to work better. Maybe other similar (Tomioka??) lenses have another solution for the back lens that avoid sense reflections ?
#1
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Sony A7RII/ Nikon 28mm AI-s f2,8/ SMC Pentax K 28mm ff3,5/ Super Takumar 50mm F1,8 8 elements/SMC Takumar 50mm F1,4/Minolta MD 35 F2,8/ Auto Chinon Macro 55mm F1,7/ SMC Takumar 55mm f1,8/ Yashinon DS-M 50mm F1,4/ Mamayia Sekor 55mm F1,4/ Auto Chinon 55mm f1,4/ Auto Chinon MC 50mm f1,7/ Porst 35mm f1,8/ Auto Chinon MC 55mm f1,4/ Helios 44M4 58mm f2/ Fujinon EBC 50mm f1,4/ Yashica ML 28mm f2,8/ Zeiss Jena 50mm f2,8/ Volna-9 Macro 50mm f2,8/ Minoplta MD 35-70mm f3,5/ SMC Takumar Macro 50mm f4/ SMC Takumar Macro 100mm F4/ SMC Takumar 85mm f1,8/ Ricoh Rikenon 50mm f2/ Konica Hexanon AR 50mm f1,7/ SMC Takumar 28mm f3,5/ SMC Takumar 35mm f3,5/ Yashica DX 50mm F1,7, Yashica DX 50mm F1,4 |
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Sat Apr 27, 2019 2:01 pm Post subject: |
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kiddo wrote:
I've never heard of this type of fixing before. I've heard of adapter issues, which could be fixed flocking the inner part of it, or sensor reflections, that's got to do with the sensor filters. Painting the thread on cold on top of anodized thread,sooner or later (sooner) will make loose the paint inside the sensor compartment, that's why I don't see it. |
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D1N0
Joined: 07 Aug 2012
Posts: 2493
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| Posted: Sat Apr 27, 2019 4:18 pm Post subject: |
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D1N0 wrote:
I painted my sensor black instead. Works like a charm :p
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vonBaloney
Joined: 27 May 2014
Posts: 6
Location: Savannah, GA
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| Posted: Sat Apr 27, 2019 4:19 pm Post subject: |
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vonBaloney wrote:
Sensor reflections are usually caused by flat rear elements that directly reflect light that has already bounced off the sensor back onto the sensor, i.e. it is essentially two parallel flat mirrors facing each other and (some of) the light bounces back and forth. Aperture blades that are a bit too reflective on the rear side can also be problematic. |
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Sat Apr 27, 2019 6:20 pm Post subject: |
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kiddo wrote:
| D1N0 wrote: |
| I painted my sensor black instead. Works like a charm :p |
Well, that is supposed to be the last solution, isn't it? |
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Chardin
Joined: 14 Dec 2017
Posts: 18
Location: Sweden
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| Posted: Sat Apr 27, 2019 7:51 pm Post subject: |
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Chardin wrote:
I will test if it works on similar shots that have ben problematic and se if it works.
_________________
Sony A7RII/ Nikon 28mm AI-s f2,8/ SMC Pentax K 28mm ff3,5/ Super Takumar 50mm F1,8 8 elements/SMC Takumar 50mm F1,4/Minolta MD 35 F2,8/ Auto Chinon Macro 55mm F1,7/ SMC Takumar 55mm f1,8/ Yashinon DS-M 50mm F1,4/ Mamayia Sekor 55mm F1,4/ Auto Chinon 55mm f1,4/ Auto Chinon MC 50mm f1,7/ Porst 35mm f1,8/ Auto Chinon MC 55mm f1,4/ Helios 44M4 58mm f2/ Fujinon EBC 50mm f1,4/ Yashica ML 28mm f2,8/ Zeiss Jena 50mm f2,8/ Volna-9 Macro 50mm f2,8/ Minoplta MD 35-70mm f3,5/ SMC Takumar Macro 50mm f4/ SMC Takumar Macro 100mm F4/ SMC Takumar 85mm f1,8/ Ricoh Rikenon 50mm f2/ Konica Hexanon AR 50mm f1,7/ SMC Takumar 28mm f3,5/ SMC Takumar 35mm f3,5/ Yashica DX 50mm F1,7, Yashica DX 50mm F1,4 |
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Chardin
Joined: 14 Dec 2017
Posts: 18
Location: Sweden
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| Posted: Sat Apr 27, 2019 8:05 pm Post subject: |
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Chardin wrote:
I have other lenses with flat rear element, Auto Chinon multi coated 55mm F1,4 M42, Auto Chinon 55mm F1,4 M42 (Tomioka) , Auto Mamiya Sekor 55mm F1,4 M42, no problem with sensor reflections on them.
_________________
Sony A7RII/ Nikon 28mm AI-s f2,8/ SMC Pentax K 28mm ff3,5/ Super Takumar 50mm F1,8 8 elements/SMC Takumar 50mm F1,4/Minolta MD 35 F2,8/ Auto Chinon Macro 55mm F1,7/ SMC Takumar 55mm f1,8/ Yashinon DS-M 50mm F1,4/ Mamayia Sekor 55mm F1,4/ Auto Chinon 55mm f1,4/ Auto Chinon MC 50mm f1,7/ Porst 35mm f1,8/ Auto Chinon MC 55mm f1,4/ Helios 44M4 58mm f2/ Fujinon EBC 50mm f1,4/ Yashica ML 28mm f2,8/ Zeiss Jena 50mm f2,8/ Volna-9 Macro 50mm f2,8/ Minoplta MD 35-70mm f3,5/ SMC Takumar Macro 50mm f4/ SMC Takumar Macro 100mm F4/ SMC Takumar 85mm f1,8/ Ricoh Rikenon 50mm f2/ Konica Hexanon AR 50mm f1,7/ SMC Takumar 28mm f3,5/ SMC Takumar 35mm f3,5/ Yashica DX 50mm F1,7, Yashica DX 50mm F1,4 |
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Sat Apr 27, 2019 9:44 pm Post subject: |
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kiddo wrote:
Maybe these last one's got better coatings on the inside lenses which prevents sensor reflections? |
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visualopsins
Joined: 05 Mar 2009
Posts: 10541
Location: California
Expire: 2025-04-11
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| Posted: Sat Apr 27, 2019 11:04 pm Post subject: |
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visualopsins wrote:
There was a report here someplace about a conversation with Tamron at trade show saying the rear element of 90mm 52B, 52BB, is not coated, hence the reflective hot spot in center of frame due to reflections from elements inside the lens on the sensor/film. Reducing aperture size makes reflection worse, which should be a clue to cause.
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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Blazer0ne
Joined: 12 Sep 2018
Posts: 836
Expire: 2024-12-07
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| Posted: Sun Apr 28, 2019 2:43 am Post subject: Re: Sensor reflection |
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Blazer0ne wrote:
...
Last edited by Blazer0ne on Tue Feb 22, 2022 5:18 pm; edited 1 time in total |
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vonBaloney
Joined: 27 May 2014
Posts: 6
Location: Savannah, GA
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| Posted: Sun Apr 28, 2019 3:23 am Post subject: |
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vonBaloney wrote:
| Chardin wrote: |
| I have other lenses with flat rear element, Auto Chinon multi coated 55mm F1,4 M42, Auto Chinon 55mm F1,4 M42 (Tomioka) , Auto Mamiya Sekor 55mm F1,4 M42, no problem with sensor reflections on them. |
I have a couple of Mayima/Sekor 55/1.4s -- they both get aperture shaped hotspots when stopped down. |
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Chardin
Joined: 14 Dec 2017
Posts: 18
Location: Sweden
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| Posted: Sun Apr 28, 2019 3:53 am Post subject: |
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Chardin wrote:
It look something like this, in the center of the picture the dark area are a bit lighter.
#1
_________________
Sony A7RII/ Nikon 28mm AI-s f2,8/ SMC Pentax K 28mm ff3,5/ Super Takumar 50mm F1,8 8 elements/SMC Takumar 50mm F1,4/Minolta MD 35 F2,8/ Auto Chinon Macro 55mm F1,7/ SMC Takumar 55mm f1,8/ Yashinon DS-M 50mm F1,4/ Mamayia Sekor 55mm F1,4/ Auto Chinon 55mm f1,4/ Auto Chinon MC 50mm f1,7/ Porst 35mm f1,8/ Auto Chinon MC 55mm f1,4/ Helios 44M4 58mm f2/ Fujinon EBC 50mm f1,4/ Yashica ML 28mm f2,8/ Zeiss Jena 50mm f2,8/ Volna-9 Macro 50mm f2,8/ Minoplta MD 35-70mm f3,5/ SMC Takumar Macro 50mm f4/ SMC Takumar Macro 100mm F4/ SMC Takumar 85mm f1,8/ Ricoh Rikenon 50mm f2/ Konica Hexanon AR 50mm f1,7/ SMC Takumar 28mm f3,5/ SMC Takumar 35mm f3,5/ Yashica DX 50mm F1,7, Yashica DX 50mm F1,4 |
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visualopsins
Joined: 05 Mar 2009
Posts: 10541
Location: California
Expire: 2025-04-11
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| Posted: Sun Apr 28, 2019 11:31 am Post subject: |
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visualopsins wrote:
I'm not seeing it...
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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Teemō
Joined: 07 Apr 2016
Posts: 586
Location: Australia
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| Posted: Sun Apr 28, 2019 12:56 pm Post subject: |
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Teemō wrote:
I see it in the middle of the brown structure. Brighter and a bit purple, washed out. |
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Blazer0ne
Joined: 12 Sep 2018
Posts: 836
Expire: 2024-12-07
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| Posted: Sun Apr 28, 2019 1:56 pm Post subject: |
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Blazer0ne wrote:
...
Last edited by Blazer0ne on Tue Feb 22, 2022 5:18 pm; edited 1 time in total |
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Chardin
Joined: 14 Dec 2017
Posts: 18
Location: Sweden
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| Posted: Tue Apr 30, 2019 8:28 pm Post subject: |
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Chardin wrote:
The Camera are Sony A7RII. The picture are cropped from full frame pic.
The flowers are in bloom right now, its going too fast.
_________________
Sony A7RII/ Nikon 28mm AI-s f2,8/ SMC Pentax K 28mm ff3,5/ Super Takumar 50mm F1,8 8 elements/SMC Takumar 50mm F1,4/Minolta MD 35 F2,8/ Auto Chinon Macro 55mm F1,7/ SMC Takumar 55mm f1,8/ Yashinon DS-M 50mm F1,4/ Mamayia Sekor 55mm F1,4/ Auto Chinon 55mm f1,4/ Auto Chinon MC 50mm f1,7/ Porst 35mm f1,8/ Auto Chinon MC 55mm f1,4/ Helios 44M4 58mm f2/ Fujinon EBC 50mm f1,4/ Yashica ML 28mm f2,8/ Zeiss Jena 50mm f2,8/ Volna-9 Macro 50mm f2,8/ Minoplta MD 35-70mm f3,5/ SMC Takumar Macro 50mm f4/ SMC Takumar Macro 100mm F4/ SMC Takumar 85mm f1,8/ Ricoh Rikenon 50mm f2/ Konica Hexanon AR 50mm f1,7/ SMC Takumar 28mm f3,5/ SMC Takumar 35mm f3,5/ Yashica DX 50mm F1,7, Yashica DX 50mm F1,4 |
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Blazer0ne
Joined: 12 Sep 2018
Posts: 836
Expire: 2024-12-07
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| Posted: Tue Apr 30, 2019 9:01 pm Post subject: |
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Blazer0ne wrote:
...
Last edited by Blazer0ne on Tue Feb 22, 2022 5:18 pm; edited 1 time in total |
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aidaho
Joined: 29 Apr 2018
Posts: 456
Location: Ukraine
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| Posted: Wed May 01, 2019 8:40 am Post subject: |
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aidaho wrote:
To be honest, I can't see a problem here either.
The change is almost imperceptible, and you would get more significant brightness distribution delta when boosting local contrast.
Which is, again, a non-issue.
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https://www.flickr.com/photos/curry-hexagon/ |
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visualopsins
Joined: 05 Mar 2009
Posts: 10541
Location: California
Expire: 2025-04-11
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| Posted: Wed May 01, 2019 6:15 pm Post subject: |
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visualopsins wrote:
| Blazer0ne wrote: |
| ...Maybe you were wearing a white t-shirt which caused some reflection of light against the foreground subject... |
Astute observation imho!!!
The principle behind recent cameras which see around corners & through objects; in-frame light reflected from out of frame objects.
In this case like assistant holding reflector light onto subject. Could this be cause?
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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Ray Parkhurst
Joined: 04 Jul 2011
Posts: 497
Location: Santa Clara, CA, USA
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| Posted: Sun May 12, 2019 11:51 pm Post subject: |
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Ray Parkhurst wrote:
A rectangular baffle eliminates stray light from hitting the sensor, and further reduces reflected light from hitting the lens, and then reduces re-reflected light from hitting the sensor again. A baffle will cut down ~40% of the total light paths, so I'd guess it would reduce the re-reflected light significantly, maybe by as much as 78%
_________________
...See my Numismatic Photography website at: http://www.macrocoins.com
...Primary Studio Cameras: Sony A7Rm4 and Canon HRT2i
...Go-To studio lenses: Nikon 95mm and 105mm Printing-Nikkors; Schneider 85mm Macro-Varon; Nikon 5x, 10x, and 20x Measuring Microscope Objectives; Mitutoyo BD Plan Apo 50x Microscope Objective
...My Go-To Walkaround Lenses: Laowa 60mm Super Macro; Nikon 28-105D (in manual mode for macro); |
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