visualopsins
Joined: 05 Mar 2009 Posts: 10526 Location: California
Expire: 2025-04-11
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Posted: Sat Oct 06, 2018 10:05 pm Post subject: |
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visualopsins wrote:
There are lenses that look exactly as if somebody removed the grub screws leaving the inside of the T-adapter screwed on the lens, however, the inside part isn't screwed on but is integral part of lens body. Outer rings were sold in various ccamera mounts.
Sometimes the inner part of T2-adapter can be used. Sometimes the lens needs another diameter. _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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Alun Thomas
Joined: 20 Aug 2018 Posts: 625 Location: New Zealand
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Posted: Sat Oct 06, 2018 10:50 pm Post subject: |
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Alun Thomas wrote:
I believe that to be the case here. From the wikipedia entry: "Some T-mount lenses accept a T-adapter that lacks its threaded inner ring, and simply slides onto the T-mount lens. It is secured only by 3 set screws that match a channel on the lens barrel, such that the barrel is not deformed by the set screws and the adapter can therefore be removed with no damage."
I have two lenses with the same diameter adapter of this type, the picture I posted is a Soligor 180 F/3.5 preset lens. The other lens I have is of modern manufacture, a Kenko 400mm F/8 reflex lens. What I would like to do is change the adaptor on that one to a different type.
I took a couple of extra photos:
[img]
The adaptor has a flat section protruding which is 42mm O.D, however this is not threaded, so the other part doesn't seem designed to unscrew.
[/img]
The mount does look like it may unscrew from the other part, but this would leave a female threaded part. I'm not sure of the diameter, as this part would not unscrew easily. |
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