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reMac
Joined: 18 Jul 2015
Posts: 20
Location: Spokane, Washington, USA
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 Posted: Tue Apr 19, 2016 1:34 am Post subject: Pentax S-M-C Takumar 1:3.5/135 - Rear Baffle Repair |
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reMac wrote:
Pentax Super-Multi-Coated Takumar 1:3.5/135 (M42 Mount)
I bought this lens at a thrift store last year. When I took the rear lens cap off at the store, the rear baffle fell out of the back of the lens. I bought the lens anyway because the optics looked very good and it was really cheap. I don't see any obvious way to attach the rear baffle to the lens, no threads, no slots for a spanner wrench, etc. It drops in place perfectly into the back of the lens, but when the lens is tipped upside down, the baffle falls out again. Any idea on how it is supposed to stay in there? Adhesive? There is some damage on the baffle (on the right edge of the photo, along the thin slot) where it looks like the baffle was bent and an attempt was made to try and flatten it out. Thanks.
Matt
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Gerald
Joined: 25 Mar 2014
Posts: 1196
Location: Brazil
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| Posted: Tue Apr 19, 2016 1:48 am Post subject: |
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Gerald wrote:
Can you glue it?
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If raindrops were perfect lenses, the rainbow did not exist. |
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reMac
Joined: 18 Jul 2015
Posts: 20
Location: Spokane, Washington, USA
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| Posted: Tue Apr 19, 2016 4:04 am Post subject: |
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reMac wrote:
I guess that's an option. I wonder if the lens came from the factory with the baffle glued on? I was hoping for a mechanical connection of some sort.
Matt |
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Himself
Joined: 01 Mar 2007
Posts: 3216
Location: Montreal
Expire: 2013-05-30
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| Posted: Tue Apr 19, 2016 12:16 pm Post subject: |
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Himself wrote:
Can you use the lens without the baffle?
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Moderator Himself |
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reMac
Joined: 18 Jul 2015
Posts: 20
Location: Spokane, Washington, USA
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| Posted: Tue Apr 19, 2016 3:41 pm Post subject: |
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reMac wrote:
Yes, and that's what I've been doing. I've only used this lens on a Nikon J1 (2.7x crop = 365mm) to take airplane photos from my back yard though. I haven't noticed anything wrong with the photos, so I am assuming the lack of the baffle isn't causing any problems. I haven't used this lens for anything else since the J1 disables focus assist when using legacy lenses; I just keep it at infinity focus.
Matt |
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visualopsins
Joined: 05 Mar 2009
Posts: 10362
Location: California
Expire: 2021-06-22
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| Posted: Tue Apr 19, 2016 8:09 pm Post subject: |
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visualopsins wrote:
Imho the rear baffle on this lens is an Asahi afterthought.  Seeing as how it is not really a mechanical part of the lens body, being simply pressed in & fastened there with a tiny drop or two (each side) of glue (rubber cement)...
Why they added the baffle later (or in the first place) could be 1) to keep dust out or 2) to actually baffle light lens projects into camera?
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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