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tikkathree
Joined: 19 Jun 2010
Posts: 755
Location: Lovely Suffolk in Great Britain
Expire: 2012-12-28
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 Posted: Sat Sep 25, 2010 8:37 pm Post subject: Exacta mount lenses - not many adapters about? |
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tikkathree wrote:
I picked this up so cheaply I might just use it as a paperweight. It would be nice to give it a run though but unless I'm shaping wooden, there don't seem to be many exacta to EOS adapters about?
_________________
I used to think digital was fun but then I discovered film, then I found old lenses and then, eventually I found rangefinders.
EOS 5DII, loadsalenses
Canon G9 IR conv,
MF: TLR, 645 and folders
35mm: Oly OM Pro bodies 1, 2, 3 and 4; Soviet RF kit |
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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Sat Sep 25, 2010 8:53 pm Post subject: |
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martyn_bannister wrote:
Theoretically possible. Exakta register is 44.7mm, canon EOS is 44.0mm (from HERE)
Only 0.7mm to play with and a bayonet into a bayonet. I have seen threads here and elsewhere describing various solutions. I believe those that exist are expensive though. |
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tikkathree
Joined: 19 Jun 2010
Posts: 755
Location: Lovely Suffolk in Great Britain
Expire: 2012-12-28
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| Posted: Sat Sep 25, 2010 9:22 pm Post subject: |
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tikkathree wrote:
| martyn_bannister wrote: |
Theoretically possible. Exakta register is 44.7mm, canon EOS is 44.0mm (from HERE)
Only 0.7mm to play with and a bayonet into a bayonet. I have seen threads here and elsewhere describing various solutions. I believe those that exist are expensive though. |
Maybe that's why it cost less than £1 then. Paperweight anyone?
_________________
I used to think digital was fun but then I discovered film, then I found old lenses and then, eventually I found rangefinders.
EOS 5DII, loadsalenses
Canon G9 IR conv,
MF: TLR, 645 and folders
35mm: Oly OM Pro bodies 1, 2, 3 and 4; Soviet RF kit |
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Sat Sep 25, 2010 9:51 pm Post subject: |
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luisalegria wrote:
There are plenty of Exakta-Canon/EOS adapters. Most seem rather expensive.
Quality seems to vary. Not all work with all lenses apparently. There are plenty here with experience with these.
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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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visualopsins
Joined: 05 Mar 2009
Posts: 10967
Location: California
Expire: 2025-04-11
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| Posted: Sat Sep 25, 2010 10:02 pm Post subject: |
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visualopsins wrote:
In the second photo do I see holes in the mount used for twisting on & off the exacta bayonet, also an M42 auto-diaphragm pin? Could that be an M42 lens with an exacta adapter? Yes, I think it is! There is also an A-M diaphragm switch!
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Sat Sep 25, 2010 11:01 pm Post subject: |
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luisalegria wrote:
You are right, thats not an Exakta mount. No locking lug, and is there is a cutout on one of the flanges? Some other M42 adapter then ?
I don't think an M42-Exakta adapter is possible, at least not with infinity focus, as the Exakta mount is too narrow (38mm) to permit any part of the M42 thread to enter.
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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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alex
Joined: 18 Apr 2009
Posts: 561
Location: UK
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| Posted: Sat Sep 25, 2010 11:01 pm Post subject: |
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alex wrote:
This doesn't look like a native Exakta mount to me. There's no pin I can see to engage in the lens arresting lever on the camera lens mount, and the absence of an external stop down mechanism suggests that it's not a Varex type, but it could be either Topcon (which I'm not familiar with), or the RTL type Exakta mouint, which has an internal stop down pin, but which is located outside the bayonet mount, not inside it as seen here. As I recall, the Exakta bayonet was rather narrow in diameter. Are you quite certain it is Exakta fit?
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tikkathree
Joined: 19 Jun 2010
Posts: 755
Location: Lovely Suffolk in Great Britain
Expire: 2012-12-28
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| Posted: Sun Sep 26, 2010 5:24 am Post subject: |
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tikkathree wrote:
| alex wrote: |
This doesn't look like a native Exakta mount to me.......
Are you quite certain it is Exakta fit? |
Er, no I'm not actually. I think the auction listing mentioned Exacta but I'm such a MF beginner... let's have a look... Auto Optomax 1:3.5 f=200mm 58 diameter filter thread No220662 and at the other end yes, there is a short pin in board of the flange. Would a better photo showing the lugs help?
_________________
I used to think digital was fun but then I discovered film, then I found old lenses and then, eventually I found rangefinders.
EOS 5DII, loadsalenses
Canon G9 IR conv,
MF: TLR, 645 and folders
35mm: Oly OM Pro bodies 1, 2, 3 and 4; Soviet RF kit |
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exaklaus
Joined: 11 Aug 2009
Posts: 1633
Location: Niederrhein, Germany
Expire: 2011-12-02
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| Posted: Sun Sep 26, 2010 5:47 am Post subject: |
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exaklaus wrote:
Not Exakta.
Klaus
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my Ebay auctions
Canon 5D II,
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Tachihara 4"x5"
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Color-Heliar 75mm F2.5 SL
www.autoselbstfotografie.de
www.classic-cameras-and-lenses.de |
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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Sun Sep 26, 2010 5:58 am Post subject: |
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martyn_bannister wrote:
| visualopsins wrote: |
| In the second photo do I see holes in the mount used for twisting on & off the exacta bayonet, also an M42 auto-diaphragm pin? Could that be an M42 lens with an exacta adapter? Yes, I think it is! There is also an A-M diaphragm switch! |
Good spot! Certainly worth giving it a mighty twist to see if it will unscrew 
Closer look. Is it fitted with an M42/Minolta adapter? There is an off-centre cutout in one of the bayonet lugs. The red "M" on the side might mean it's a native Minolta mount, or it could describe the adapter? Certainly the pin looks to be in a strange position in relation to the bayonet. Too close to it? |
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tikkathree
Joined: 19 Jun 2010
Posts: 755
Location: Lovely Suffolk in Great Britain
Expire: 2012-12-28
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| Posted: Sun Sep 26, 2010 6:32 am Post subject: |
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tikkathree wrote:
| martyn_bannister wrote: |
Closer look. Is it fitted with an M42/Minolta adapter? There is an off-centre cutout in one of the bayonet lugs. The red "M" on the side might mean it's a native Minolta mount, or it could describe the adapter? Certainly the pin looks to be in a strange position in relation to the bayonet. Too close to it? |
Okay, very quick update. The bright metal flange bit has two grubscrew holes to secure it to the back of the lens. The holes aren't currently occupied so there could be a threaded ring mount, maybe there's adhesive. It desn't respond to an application of pressure. I've got to go out shortly but will return to this challenge later.
_________________
I used to think digital was fun but then I discovered film, then I found old lenses and then, eventually I found rangefinders.
EOS 5DII, loadsalenses
Canon G9 IR conv,
MF: TLR, 645 and folders
35mm: Oly OM Pro bodies 1, 2, 3 and 4; Soviet RF kit |
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mo
Joined: 27 Aug 2009
Posts: 8979
Location: Australia
Expire: 2016-07-30
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| Posted: Sun Sep 26, 2010 8:12 am Post subject: |
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mo wrote:
I think Minolta mount..try using a rubber glove for better grip or leather belt...both worked for me when I could not get equal pressure... 
_________________
Moira, Moderator 
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
Ricoh Singlex TLS,KR-5,KR-5Super,XR-10
Lenses
Auto Rikenon's 55/1.4, 1.8, 2.8... 50/1.7 Takumar 2/58 Preset Takumar 2.8/105 Auto Takumar 2.2/55, 3.5/35 Super Takumar 1.8/55...Macro Takumar F4/50... CZJ Biotar ALU M42 2/58 CZJ Tessar ALU M42 2.8/50
CZJ DDR Flektogon Zebra M42 2.8/35 CZJ Pancolar M42 2/50 CZJ Pancolar Exakta 2/50
Auto Mamiya/Sekor 1.8/55 ...Auto Mamiya/Sekor 2/50 Auto Mamiya/Sekor 2.8/50 Auto Mamiya/Sekor 200/3.5 Tamron SP500/8 Tamron SP350/5.6 Tamron SP90/2.5
Primoplan 1.9/58 Primagon 4.5/35 Telemegor 5.5/150 Angenieux 3.5/28 Angenieux 3,5/135 Y 2
Canon FL 58/1.2,Canon FL85/1.8,Canon FL 100/3.5,Canon SSC 2.8/100 ,Konica AR 100/2.8, Nikkor P 105/2.5
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tikkathree
Joined: 19 Jun 2010
Posts: 755
Location: Lovely Suffolk in Great Britain
Expire: 2012-12-28
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| Posted: Sun Sep 26, 2010 12:21 pm Post subject: |
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tikkathree wrote:
| mo wrote: |
| I think Minolta mount..try using a rubber glove for better grip or leather belt...both worked for me when I could not get equal pressure... |
I don't know how much force you had to apply. Earlier today I got some penetrating liquid into what looks like the threaded join between the black lens body and the bright metal part. I've just had pipe wrenches onto the edge of the bright metal part and tried gentle force and shock force. No give.
I assume the thead isn't counter-clockwise and I may resort to popping it into the freezer to see what that does to the penetrating liquid.
This £1 lens won't get the better of me.
_________________
I used to think digital was fun but then I discovered film, then I found old lenses and then, eventually I found rangefinders.
EOS 5DII, loadsalenses
Canon G9 IR conv,
MF: TLR, 645 and folders
35mm: Oly OM Pro bodies 1, 2, 3 and 4; Soviet RF kit |
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mo
Joined: 27 Aug 2009
Posts: 8979
Location: Australia
Expire: 2016-07-30
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| Posted: Sun Sep 26, 2010 12:41 pm Post subject: |
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mo wrote:
I did not have to apply to much force it was getting a decent grip that made the difference.
_________________
Moira, Moderator
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
Ricoh Singlex TLS,KR-5,KR-5Super,XR-10
Lenses
Auto Rikenon's 55/1.4, 1.8, 2.8... 50/1.7 Takumar 2/58 Preset Takumar 2.8/105 Auto Takumar 2.2/55, 3.5/35 Super Takumar 1.8/55...Macro Takumar F4/50... CZJ Biotar ALU M42 2/58 CZJ Tessar ALU M42 2.8/50
CZJ DDR Flektogon Zebra M42 2.8/35 CZJ Pancolar M42 2/50 CZJ Pancolar Exakta 2/50
Auto Mamiya/Sekor 1.8/55 ...Auto Mamiya/Sekor 2/50 Auto Mamiya/Sekor 2.8/50 Auto Mamiya/Sekor 200/3.5 Tamron SP500/8 Tamron SP350/5.6 Tamron SP90/2.5
Primoplan 1.9/58 Primagon 4.5/35 Telemegor 5.5/150 Angenieux 3.5/28 Angenieux 3,5/135 Y 2
Canon FL 58/1.2,Canon FL85/1.8,Canon FL 100/3.5,Canon SSC 2.8/100 ,Konica AR 100/2.8, Nikkor P 105/2.5
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visualopsins
Joined: 05 Mar 2009
Posts: 10967
Location: California
Expire: 2025-04-11
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| Posted: Sun Sep 26, 2010 3:55 pm Post subject: |
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visualopsins wrote:
There are spanners available for this type of nut. One can be fashioned from cheap calipers or drafting dividers or made from a piece of bar stock ground away between points that fit into the holes in the adapter. I'm fairly certain this is a M42 lens with M42-Minolta MD adapter with standard right-hand thread.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Sun Sep 26, 2010 4:52 pm Post subject: |
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martyn_bannister wrote:
| tikkathree wrote: |
| mo wrote: |
| I think Minolta mount..try using a rubber glove for better grip or leather belt...both worked for me when I could not get equal pressure... |
I don't know how much force you had to apply. Earlier today I got some penetrating liquid into what looks like the threaded join between the black lens body and the bright metal part. I've just had pipe wrenches onto the edge of the bright metal part and tried gentle force and shock force. No give.
I assume the thead isn't counter-clockwise and I may resort to popping it into the freezer to see what that does to the penetrating liquid.
This £1 lens won't get the better of me. |
It will be a standard thread so it WILL unscrew counter clockwise. Pity you haven't got a Minolta body or teleconverter, you could get a decent purchase on it then. A felt rag soaked in boiling water and then wrung out could be used to apply gentle heat to the adapter alone. That might help. |
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