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exe163
Joined: 18 Mar 2009
Posts: 16
Location: California, USA
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 Posted: Sun Jun 21, 2009 1:29 am Post subject: Contax G to m4/3? |
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exe163 wrote:
Is it possible? The Contax G system has a lot of cheap but superb glass, too bad the system was short lived. |
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Sun Jun 21, 2009 3:05 am Post subject: |
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hk300 wrote:
It should be possible.
Registration Distance:
Contax G: 29mm
FourThirds: 38.7mm
I think m4/3 is 1/2 FourThirds so: 19.35mm
Assuming the above is correct, than it should be possible to make an adapter.
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exe163
Joined: 18 Mar 2009
Posts: 16
Location: California, USA
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| Posted: Sun Jun 21, 2009 4:04 am Post subject: |
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exe163 wrote:
I assume you are making it Alex?  |
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Sun Jun 21, 2009 8:11 am Post subject: |
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hk300 wrote:
| exe163 wrote: |
| I assume you are making it Alex? |
I am not sure ...
I do not have Contax G lenses and also did not buy a Panasonic G1 yet
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Orio
Joined: 24 Feb 2007
Posts: 29545
Location: West Emilia
Expire: 2012-12-04
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| Posted: Sun Jun 21, 2009 8:15 am Post subject: |
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Orio wrote:
| hk300 wrote: |
| exe163 wrote: |
| I assume you are making it Alex? |
I am not sure ...
I do not have Contax G lenses and also did not buy a Panasonic G1 yet |
Contax G lenses have an obstacle, that the mount on the camera turns the aperture ring to make it match the writings on the barrel.
Without this trick, the aperture will work just the same, but the barrel writings will not match the aperture values.
Anyway this is minor I think - if you could really make an adapter, it will be successful, as the G lenses are amongst the best lenses ever made for any camera - so much that Leica M users buy them to have them expensively converted to the M mount...
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my_photography
Joined: 03 Nov 2008
Posts: 2772
Location: Pearl of the Orient
Expire: 2016-12-25
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| Posted: Sun Jun 21, 2009 3:43 pm Post subject: |
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my_photography wrote:
Will be keeping an eye on this. If you are successful, I would be looking for a micro 4/3.
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Zeiss: CJZ Flektogon 20/2.8, CJZ Flektogon 20/4, , CJZ Pentacon 29/2.8, CJZ Flektogon 35/2.4, CJZ Pancolar 50/1.8, Tessar 50/2.8, Biotar 7.5cm/1.5, CJZ Pancolar 80/1.8, CJZ Sonnar 135/3.5, CJZ Pentacon 135/2.8 CJZ Sonnar 200/2.8
Other Germany: Meyer Primoplan 50/1.8, Meyer Trioplan 100/2.8
Takumar: SMC 50/1.4 Super Tak 55/2, Super Tak 85/1.9, S-M-C 135/3.5, Super Tak 150/4
Russian: Zenith 16/2.8, Mir-24M 2/35, Volna-9 50/2.8, Helios 44M (58/2), Helios 44M-3 MC (58/2), Helios 40 (85/1.5), Tair 11A (135/2.8 )
Others: Sears 28/2.8, Sankor 35/2.8, Enna M�nchen Tele-Ennalyt 135/3.5
Zoom Sigma Zoom 28-85/3.5-4.5
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Sun Jun 21, 2009 6:19 pm Post subject: |
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koji wrote:
As the lens (Contax G lens) without modification, you cannot adapt
these G-lenses to any system since there is no way to focus these.
They are driven by internal motor of G1/2 camera and its focus is
electrically controlled, the lens does not have manual focus ring. 
UNLESS you supply helicoid in your fancy G->m4/3 adapter, it is hopeless.
IF you can make it in this way, you may be able to sell lots of adapters.
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Mon Jun 22, 2009 5:49 am Post subject: |
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hk300 wrote:
| koji wrote: |
As the lens (Contax G lens) without modification, you cannot adapt
these G-lenses to any system since there is no way to focus these.
They are driven by internal motor of G1/2 camera and its focus is
electrically controlled, the lens does not have manual focus ring.
UNLESS you supply helicoid in your fancy G->m4/3 adapter, it is hopeless.
IF you can make it in this way, you may be able to sell lots of adapters. |
that was my next plan ... make a helicoid/adapter with changeable plates.
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Thu Jun 25, 2009 4:50 pm Post subject: |
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koji wrote:
That is a good news, Alex. Go for it.
I buy one when it is made, even tough I have no m4/3 camera (yet).
(I wanted to use Hologon to digital camera, but conversion and the lens
together is fairly expensive so far.)
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koji
Joined: 21 Jul 2008
Posts: 2108
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Tue Nov 03, 2009 8:03 pm Post subject: |
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koji wrote:
Finally "ginfinace" did it.
Click here to see on Ebay
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wilson.c
Joined: 18 Jan 2010
Posts: 364
Location: Hong Kong
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| Posted: Thu Jan 28, 2010 3:47 pm Post subject: |
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wilson.c wrote:
This is great news, I gotta go get one now!
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Wilson
DSLR: Canon 5DMkII, 500D + Panasonic GF-1
SLR: Canon T90, Canon F1, Canon A1, Canon AE1 + Rolleiflex SL66 + Bronica ETRs
R'finder: Contax G1, G2 + Leica M6, M3 + Contax II
Lenses
M42: Angenieaux 90/1.8
Canon: FD 50/3.5 Macro, FD 80/1.8, FD 80-200L/4
Contax G: CZ Hologon 16/8, CZ Biogon 21/2.8, CZ Biogon 28/2.8, CZ Planar 45/2.0, CZ Sonnar 90/2.8
P-Six: CZJ Sonnar 180/2.8, CZJ Biometar 120/2.8
Contax: Distagon 28/2.8, Distagon 28/2, Planar 85/1.4, Makro-Planar 100/2.8
Others: CZ Sonnar 135/3.5 (Hasselblad V mount)
More little ones to be documented.
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Thu Jan 28, 2010 3:51 pm Post subject: |
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hk300 wrote:
| wilson.c wrote: |
| This is great news, I gotta go get one now! |
hi Wilson ... welcome.
It is always nice to see fellow - HK-ers
Btw i sent you a pm
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