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jhonilim
Joined: 04 Dec 2009 Posts: 9 Location: Rusia
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Posted: Sat May 12, 2018 11:46 am Post subject: aperture blade for Biotar 75/1.5 Exa - Fat |
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jhonilim wrote:
Help ...!
where i can buy aperture blade for biotar 75/1.5 Exa - Fat
Broken Aperture
Thank you
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jhonilim
Joined: 04 Dec 2009 Posts: 9 Location: Rusia
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Posted: Wed May 16, 2018 10:02 am Post subject: |
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jhonilim wrote:
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jamaeolus
Joined: 19 Mar 2014 Posts: 2913 Location: Eugene
Expire: 2015-08-20
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Posted: Thu May 17, 2018 12:37 am Post subject: |
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jamaeolus wrote:
I sincerely wish you the best of luck with that. Far too few of those gems out in the world as it is. _________________ photos are moments frozen in time |
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luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Thu May 17, 2018 5:44 am Post subject: |
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luisalegria wrote:
Tough problem.
The only source of ready-made parts for these would be other 75mm Fat Biotar lenses, such as a broken, parts copy.
But those would be rare.
The only alternative would be to make one yourself, using the other blades as a pattern. I have run across cases posted on the internet of people who have made replacement aperture and shutter blades out of various materials, one being steel shim stock.
I don't think you need to use spring steel like the originals (spring steel will last longer though) but the thickness will need to be identical or very close.
The pins can be cut from a proper guage of brass wire, and held in the blade by peening (flattening with a little hammer) as the originals were.
This would all require a bit of ability as a craftsman. Lots of filing and fitting. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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Pancolart
Joined: 04 Feb 2008 Posts: 3693 Location: Slovenia, EU
Expire: 2013-11-18
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Posted: Mon May 21, 2018 10:13 am Post subject: |
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Pancolart wrote:
This was posted in other thread but i think it is your best bet using such or similar already made aperture and integrate it in the lens: https://www.ebay.com/itm/IRIS-DIAPHRAGM-Aperture-blade-with-M42-x1mm-thread-casing/263262144006
Alternative would be to find similar diameter cheap zoom lens and harvest complete aperture system. Much easier to improvise aperture lens connection then to make blades. _________________ ---------------------------------
The Peculiar Apparatus Of Victorian Steampunk Photography: 100+ Genuine Steampunk Camera Designs https://www.amazon.com/dp/B0B92829NS |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Posted: Tue May 22, 2018 2:51 am Post subject: |
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Lightshow wrote:
Post a picture of the blade on a ruler or pin to pin measurements , then anyone that's working on a lens can compare the blades in their lens to yours.
You may find a blade with a similar measurement but likely a different shape, more like a ) and less like a 7.
I don't see any reason why changing type wouldn't work. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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jhonilim
Joined: 04 Dec 2009 Posts: 9 Location: Rusia
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Posted: Sun Oct 21, 2018 2:15 am Post subject: |
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jhonilim wrote:
Thank you for all reply ,
Email reply from my Supplier
Dear,
sorry for my late reply,
our technican checked,we should make model for your sample,and the model is about 600 USD.
and after the model,the price of the sample is about usd3,thankyou!
I think if you only need 20 pcs,it is very expensive,thankyou!
waitting for your reply
best regards,
Anyone interest ? |
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visualopsins
Joined: 05 Mar 2009 Posts: 10463 Location: California
Expire: 2021-06-22
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Posted: Sun Oct 21, 2018 2:45 am Post subject: |
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visualopsins wrote:
Fix the broken blade, why not? Pin broken? Make new pin. Blade bent? Flatten, same technique as automobile body repair. _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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