nimoythecat
Joined: 21 Apr 2021 Posts: 14 Location: United States
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Posted: Sat Feb 26, 2022 10:45 pm Post subject: Fujica ST-701 Infinity Focus Problem |
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nimoythecat wrote:
I picked up an ST-701 from a thrift thing and for some reason, none of my M42 lenses will focus to infinity on it. I don't have any contemporary Fujinon lenses, but my Chinon 55mm f/1.7, Pancolar 50mm f/1.8, and Pentax 55mm f/1.8 do not reach infinity. In fact, they do not seem to screw in all the way in, thus the lens arrow lines up short of the 12 o'clock position on the body. Is there anything weird about the ST-701 that would cause this? The mount looks fine and all. All I can think of is that the internal mount threads may be stripped, but that would be weird. Does the ST-701 require its original lenses or something? Thanks! |
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visualopsins
Joined: 05 Mar 2009 Posts: 10463 Location: California
Expire: 2021-06-22
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Posted: Sat Feb 26, 2022 11:50 pm Post subject: |
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visualopsins wrote:
Lenses not screwing all the way in is indeed the problem. Maybe something is in the way, blocking full mounting, given the mount threads look okay.
M42 Super-Multi-Coated 1:2.5 / 135 screws all the way into my ST-705. Looks like infinity is reached through the viewfinder. _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony A7Rii, Spotmatics II, F, and ESII, Nikon P4
M42 Asahi Optical Co., Lenses:
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
Other lenses:
Carl Zeiss Jena Flektogon 2.4/35
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
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titrisol70
Joined: 14 Dec 2021 Posts: 144 Location: State of Denial
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Posted: Tue Mar 01, 2022 3:27 pm Post subject: Re: Fujica ST-701 Infinity Focus Problem |
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titrisol70 wrote:
nimoythecat wrote: |
I picked up an ST-701 from a thrift thing and for some reason, none of my M42 lenses will focus to infinity on it. I don't have any contemporary Fujinon lenses, but my Chinon 55mm f/1.7, Pancolar 50mm f/1.8, and Pentax 55mm f/1.8 do not reach infinity. In fact, they do not seem to screw in all the way in, thus the lens arrow lines up short of the 12 o'clock position on the body. Is there anything weird about the ST-701 that would cause this? The mount looks fine and all. All I can think of is that the internal mount threads may be stripped, but that would be weird. Does the ST-701 require its original lenses or something? Thanks! |
ST701 mounts any M42 lens, it seems to me that the lens mount thread is damaged.
Run your finger thru it and feel if there is anything stopping a lens from mounting, it might be dirt, or a bent alumnimum thread.
Also check that your front ring is smooth (no screws) before mounting SMC-Takumar lenses |
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