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Computar 12.5mm f1.8

 
 
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walter g



Level 3

Joined: 20 Feb 2010
Posts: 2065
Location: NC, USA


PostPosted: Sun Feb 12, 2012 6:57 am    Post subject: Computar 12.5mm f1.8 Reply with quote

I just bought one. Has anyone tried it. I wanted the 12.5mm f1.3, but I thought this was a good deal.
Click here to see on Ebay
_________________

Main cameras
Minolta X370-N,Konica C35,Canon EOS 10D,Panasonic G1
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PF 1.4/50, MC Rokkor X PF 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6, Vivitar Macro Focusing T/C in MD mount
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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walter g



Level 3

Joined: 20 Feb 2010
Posts: 2065
Location: NC, USA


PostPosted: Wed Feb 22, 2012 2:11 am    Post subject: Reply with quote

I received the lens today, and too me it looks like it's a NOS lens. MFD is 0.4 meters, and the appeture stops down to a hex shape.
It will screw in partially to one of my c-mount adapters.
Without machining you get macro only. I will try to test in macro tomorrow.
Coverage of m4/3 sensor seems decent, if my estimate is correct it will give 27-28mm F/F equivalent. I need to find someone who can machine the mount for me.
I think this will make a nice wide angle lens for my G1.
I hate to post this pic, but there is no way to test it.I stopped the lens all the way down to f16 and took this shot in 16:9 mode.
So this will give you an idea of coverage. I shot this at 20 feet away fron the front porch. Of course there is no way to get it in focus without machining the mount, except in macro.


_________________

Main cameras
Minolta X370-N,Konica C35,Canon EOS 10D,Panasonic G1
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PF 1.4/50, MC Rokkor X PF 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6, Vivitar Macro Focusing T/C in MD mount
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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ekoe




Joined: 28 Jul 2011
Posts: 47


PostPosted: Thu Feb 23, 2012 12:00 pm    Post subject: Reply with quote

Hello Walter G. I can machine that mount for you and adjust the lens so it works properly on m4/3. I'm not able to reduce the vignetting
on this model of lens, however. You can contact me through my website: www.ekoecamera.com
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walter g



Level 3

Joined: 20 Feb 2010
Posts: 2065
Location: NC, USA


PostPosted: Fri Feb 24, 2012 1:45 am    Post subject: Reply with quote

ekoe wrote:
Hello Walter G. I can machine that mount for you and adjust the lens so it works properly on m4/3. I'm not able to reduce the vignetting
on this model of lens, however. You can contact me through my website: www.ekoecamera.com


Thank you. I will contact you after payday.
_________________

Main cameras
Minolta X370-N,Konica C35,Canon EOS 10D,Panasonic G1
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PF 1.4/50, MC Rokkor X PF 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6, Vivitar Macro Focusing T/C in MD mount
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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View user's profile Send private message  No rate
Share
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