LLB!
Joined: 26 Aug 2020
Posts: 59
Location: Belarus
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 Posted: Wed Dec 09, 2020 5:02 pm Post subject: Medical Industar-50MT 7/50 to Sony A6000 |
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LLB! wrote:
The lens in its rear part has a free threaded section 3.5 mm long. A brass ring with two threads, a macro ring and a helicoid allowed the lens to be attached to the camera. In this case, the helicoid focuses the lens in the range from 56.5 cm to infinity. Its extension is only 5 mm. With a large stretch helicoid and a set of macro rings, the lens will work in macro mode.
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In hoc veritas non est verum. |
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visualopsins
Joined: 05 Mar 2009
Posts: 11067
Location: California
Expire: 2025-04-11
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| Posted: Tue Dec 22, 2020 8:21 pm Post subject: |
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visualopsins wrote:
| LLB! wrote: |
| As I have seen, the lens is not afraid of an intense light source from the front or side. This is probably due to the simplicity of the optical scheme and low aperture. There is no need to put an anti-sun lens hood on the lens. |
Probably due to recessed front element -- lens body acts like hood to shade front element from intense light source.
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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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LLB!
Joined: 26 Aug 2020
Posts: 59
Location: Belarus
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| Posted: Wed Dec 30, 2020 9:40 pm Post subject: |
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LLB! wrote:
| visualopsins wrote: |
| LLB! wrote: |
| As I have seen, the lens is not afraid of an intense light source from the front or side. This is probably due to the simplicity of the optical scheme and low aperture. There is no need to put an anti-sun lens hood on the lens. |
Probably due to recessed front element -- lens body acts like hood to shade front element from intense light source. |
I have defined the working properties of this lens as corresponding to the word "standard". I see good sharpness and good contrast. Several RAW files were converted to TIFF and then combined into one in a program called ZereneStacker.
Image 2 - flash, tripod, no increase in sharpness during post-processing.
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_________________
In hoc veritas non est verum.
Last edited by LLB! on Thu Dec 31, 2020 3:11 pm; edited 1 time in total |
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