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DonN
Joined: 30 Jul 2017
Posts: 38
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 Posted: Sun May 05, 2019 4:27 pm Post subject: Bronica 645 Range Finder Lens |
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DonN wrote:
I recently bought a Bronica 645 Range Finder 65mm F4 lens (lens only - no body). I've looked all over the internet trying to find info on how this lens works exactly? I downloaded a copy of the Bronica 645 camera owners manual, but its pretty much on how to use the camera. It is a manual focus lens, it has an aperture ring, but I can't determine if the aperture ring is electronic or if the aperture blades are hidden inside the lens. From what info I could find the lens electronically winds the shutter using power from the camera body. I was hoping to hack this lens and use it on a full frame Sony A7RII (crazy I know), but I'm hoping to be able to adjust the aperture. Also does anyone how much power/voltage would be needed to maybe electronically open the shutter without a camera body? Which electrical contact does what? Any info is appreciated.
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visualopsins
Joined: 05 Mar 2009
Posts: 11022
Location: California
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| Posted: Sun May 05, 2019 4:52 pm Post subject: |
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visualopsins wrote:
Look at adapter for a7r2, if it exists... 
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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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DonN
Joined: 30 Jul 2017
Posts: 38
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| Posted: Sun May 05, 2019 7:48 pm Post subject: |
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DonN wrote:
| visualopsins wrote: |
| Look at adapter for a7r2, if it exists... |
Thanks. However there are no adapters for this lens that I am aware of. I realize I need to make my own adapter, but first I need to know how the lens works first.
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visualopsins
Joined: 05 Mar 2009
Posts: 11022
Location: California
Expire: 2025-04-11
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| Posted: Sun May 05, 2019 10:05 pm Post subject: |
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visualopsins wrote:
| DonN wrote: |
| visualopsins wrote: |
| Look at adapter for a7r2, if it exists... |
Thanks. However there are no adapters for this lens that I am aware of. I realize I need to make my own adapter, but first I need to know how the lens works first. |
Maybe adapters for other cameras can yield necessary parts or can be used with existing a7r2 adapter?
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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-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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DonN
Joined: 30 Jul 2017
Posts: 38
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| Posted: Mon May 06, 2019 7:17 pm Post subject: |
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DonN wrote:
| visualopsins wrote: |
| DonN wrote: |
| visualopsins wrote: |
| Look at adapter for a7r2, if it exists... |
Thanks. However there are no adapters for this lens that I am aware of. I realize I need to make my own adapter, but first I need to know how the lens works first. |
Maybe adapters for other cameras can yield necessary parts or can be used with existing a7r2 adapter? |
Thanks, but this post is more or less to figure out how the lens works. I'd really like to know how the electrical contacts operate the lens.
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visualopsins
Joined: 05 Mar 2009
Posts: 11022
Location: California
Expire: 2025-04-11
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| Posted: Tue May 07, 2019 1:16 am Post subject: |
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visualopsins wrote:
| DonN wrote: |
| visualopsins wrote: |
| DonN wrote: |
| visualopsins wrote: |
| Look at adapter for a7r2, if it exists... |
Thanks. However there are no adapters for this lens that I am aware of. I realize I need to make my own adapter, but first I need to know how the lens works first. |
Maybe adapters for other cameras can yield necessary parts or can be used with existing a7r2 adapter? |
Thanks, but this post is more or less to figure out how the lens works. I'd really like to know how the electrical contacts operate the lens. |
There's some info on lens automation capabilities at https://camerapedia.fandom.com/wiki/Bronica_RF645
The electrical contacts probably carry digital signals. Get a Bronica RF645 body to hack the lens controls, if you have electronics skills. Otherwise somebody else will probably get around to making an adapter that uses camera controls to set the lens.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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-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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cooltouch
Joined: 15 Jan 2009
Posts: 9096
Location: Houston, Texas
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| Posted: Tue May 07, 2019 3:32 am Post subject: |
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cooltouch wrote:
One of the problems we Bronica owners face is that it is an orphaned brand. So people who make adapters won't see much payout for the time they spend designing and proofing an adapter or interface for Bronica lenses.
I suspect, Don, you're pretty much on your own. About all I can suggest would be to search for any Bronica specific forums and see if the brain trust there might be able to help you out. Lacking any such resource, I might suggest you try at the Photrio forums:
https://www.photrio.com/forum/
Go to the analog section, then medium format. There's lots of knowledgeable folks there, perhaps some who can give you the advice you need.
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kansalliskala
Joined: 19 Jul 2007
Posts: 5042
Location: Southern Finland countryside
Expire: 2016-12-30
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| Posted: Tue May 07, 2019 9:22 am Post subject: |
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kansalliskala wrote:
| visualopsins wrote: |
| Get a Bronica RF645 body to hack the lens controls |
https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=bronica+rf645&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=bronica+645+rf
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MF: Kodak DCS SLR/c; Samsung NX10; OM-10; Canon T50
Zuiko 28/3.5, Distagon 35/2.8; Yashica ML 50/2;
Zuiko 50/1.4; S-M-C 120/2.8; Zuiko 135/3.5; 200/5;
Tamron AD1 135/2.8, Soligor 180/3.5; Tamron AD1 300/5.6
Tamron zooms: 01A, Z-210
Yashicaflex C; Київ 4 + Юпитер 8, 11; Polaroid 100; Olympus XA; Yashica T3
Museum stuff: Certo-Phot; Tele-Edixon 135; Polaris 90-190; Asahi Bellows; Ixus IIs
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