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dimitrygo
Joined: 01 Apr 2009
Posts: 561
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 Posted: Thu Jun 25, 2009 7:11 pm Post subject: Canon FD mount registry distance |
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dimitrygo wrote:
Hello
I know the Canon FD mount registry distance is 42 mm. But would like to know how this is measured. Is it a distance to the plane A or plane B on the attached photo? Or may be something else? Thanks in advance.
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Case from Holland
Joined: 26 May 2007
Posts: 26
Location: Amsterdam, the Netherlands
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| Posted: Thu Jun 25, 2009 7:24 pm Post subject: |
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Case from Holland wrote:
Good question...
My guess: plane A |
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visualopsins
Joined: 05 Mar 2009
Posts: 10946
Location: California
Expire: 2025-04-11
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| Posted: Thu Jun 25, 2009 7:52 pm Post subject: |
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visualopsins wrote:
isn't registry distance measured on the camera from front of mount to front of film/sensor? that would be plane B. i may be wrong!
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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Rusty
Joined: 06 Nov 2008
Posts: 435
Location: Mosselbay, South Africa
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| Posted: Thu Jun 25, 2009 7:55 pm Post subject: |
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Rusty wrote:
Yep...think it is the distance from the outside surface of the mount on the camera (where it contacts the lens) to the sensor plane , in this case B
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Daniel |
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casualcollector
Joined: 01 Aug 2008
Posts: 749
Location: Spaced out on Florida's Space Coast
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| Posted: Thu Jun 25, 2009 8:23 pm Post subject: |
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casualcollector wrote:
Plane "B" is correct.
_________________
In Search Of "R" Serial Soligors
Found: 135/2.8 #R407660, 200/4 #R405526, 300/5.5 #R411127 |
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estudleon
Joined: 15 May 2008
Posts: 3754
Location: Argentina
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| Posted: Thu Jun 25, 2009 8:52 pm Post subject: |
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estudleon wrote:
The register can be taken from the external surface of the camera mount to the sensor/film.
So the register, about the lens, can be taken from the surface of the mount of the lens that is opposite to the external surface of the camera mount, and then from "A".
I did it till now. Is it wrong?
Rino.
_________________
Konica 2,8/100
CZJ: 4/20, 2,4/35, 1,8/50 aus jena, 3,5/135MC, Pentacon 1,8/50
Pentax S-M-C-1,4/50
Helios 44-3
Mamiya 2,8/135
Misc. : jupiter 9
Stuff used:
A) SRL
Alpa 10 D - kern macro Switar 1,9/50 -black, Kilffit apochromat 2/100.
Asahi pentax spotmatic super takumar 1,4/50
Contaflex super B tessar 2,8/50 Pro-tessar 115
Leica R3 electronic summicron 2/50 elmarit 2,8/35
Konica Autoreflex 3 (2 black and chrome one), TC, T4. 2,8/24, 3,5/28 not MC and MC, 1,8/40, 1,4/50, 1,7/50 MC and not MC, 1,8/85, 3,2/135, 3,5/135, 4/200
Minolta XG9 2,8/35, 2/45, 3,5/135
Nikkormat FTn 1,4/50, 2,8/135
Fujica ST 801, 605, 705n. 3,5/19, 1,4/50, 1,8/55, 4/85, 3,5/135.
Praktica MTL 5 and a lot of M42 lenses.
Voigtlander. Bessamatic m, bessamatix de luxe, bessamatic cs, ultramatic and ultramatic cs.
Skoparex 3,5/35, skopagon 2/40, skopar 2,8/50, skopar X 2,8/50, super lanthar (out of catalogue) 2,8/50, dinarex 3,4/90, dinarex 4,8/100, super dinarex 4/135, super dinarex 4/200, zoomar 2,8/36-83, portrait lens 0, 1 and 2. Curtagon 4/28 and 2,8/35
Canon AV1, 1,8/50
Rolleiflex SL35 and SL35 E. 2,8/35 angulon, 2,8/35 distagon, 1,4/55 rolleinar, 1,8/50 planar, 4/135 tessar, 2,8/135 rolleinar, x2 rollei, M42 to rollei adap.
Etc.
RF
Yashica Minister III
Voightlander Vito, vitomatic I, Vito C, etc.
Leica M. M2, M3 (d.s.) and M4. Schenider 3,4/21, 2/35 summaron 2,8/35 (with eyes). Summicron 2/35 (8 elements with eyes), 2/35 chrome, 2/35 black, 1,4/35 pre asph and aspheric - old -, 2/40 summicron, 2,8/50 elmar, 2/50 7 elements, 2/50 DR, 2/50 - minolta version, 1,4/50 summilux 1966 version, 1,4/75 summilux, 2/90 large version, 2/90 reduced version of 1987, 2,8/90 elmarit large version, 4/135 elmar. |
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Sevo
Joined: 22 Aug 2008
Posts: 1189
Location: Frankfurt, Germany
Expire: 2012-12-03
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| Posted: Thu Jun 25, 2009 9:52 pm Post subject: |
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Sevo wrote:
You are perfectly right, it is A.
B (the distance between bayonet rear and film plane) is more critical where mirror clearance is concerned, but it is no optical property of the lens system, but to some degree variable across mount generations and on lenses from third party manufacturers. It is a per-lens spec and no system-wide constant - as far as I know there are no published tables of bayonet-to-film-plane distances.
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Sevo |
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Xpres
Joined: 11 Dec 2007
Posts: 964
Location: UK
Expire: 2014-10-28
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| Posted: Thu Jun 25, 2009 10:29 pm Post subject: |
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Xpres wrote:
this is a bit like a pub quiz question...  Now who is right?
I think 'B'. The bayonet on the FD is reversed isn't it?
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Film... and sometimes SD14, 5D2 and some other suff! |
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Minolfan
Joined: 30 Dec 2008
Posts: 3437
Location: Netherlands
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| Posted: Thu Jun 25, 2009 11:17 pm Post subject: |
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Minolfan wrote:
The FD mount is a breech lock isn't? Reversed bayonet as Xpress says. So the distance between camera and lens is not made by the turning ring (A) but by the distance B, where lens construction and camera meet. How deep the glass (or mounting) of the lens is intruding in the cameramount and sometimes can touch the mirror is not concerning the same distance! |
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visualopsins
Joined: 05 Mar 2009
Posts: 10946
Location: California
Expire: 2025-04-11
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| Posted: Fri Jun 26, 2009 1:13 am Post subject: |
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visualopsins wrote:
Just now a Spiratone 18/3.5 for FD projects in-focus Sun onto glossy white inkjet paper; plane B to paper is 42mm.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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dimitrygo
Joined: 01 Apr 2009
Posts: 561
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| Posted: Fri Jun 26, 2009 7:56 pm Post subject: |
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dimitrygo wrote:
Thank you all for your voting  It seems indeed it is a plane B.
And, hey, siriusdogstar - it is ingenious way to check those things, thumbs up! |
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dakoo
Joined: 08 Mar 2008
Posts: 603
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| Posted: Sun Feb 21, 2010 7:09 am Post subject: |
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dakoo wrote:
| siriusdogstar wrote: |
| Just now a Spiratone 18/3.5 for FD projects in-focus Sun onto glossy white inkjet paper; plane B to paper is 42mm. |
That is a a great solution.
_________________
Yashica ML 2.4/24, ML 2.4./28,
Zeiss Distagon 35/1.4, Planer 1.4/50, Planer 1.7/50,
SMC Tak 1.4/50,Tessar 2.8/50, Jupiter2/85
CZJ 4/135; Pentacon 4/200
Canon Tns 24/3.5
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