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Olivier
Joined: 18 Feb 2009 Posts: 5078 Location: France
Expire: 2015-08-06
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Posted: Sat Aug 29, 2009 8:53 pm Post subject: AF confirm adapter / front focus |
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Olivier wrote:
Hello,
I got a PK to EOS AF confirm adapter and unfortunarely it suffers from front focus. No way to focus well with it.
I understand the chip must be calibrated. It's not sold as a programmable chip, so is there any way to correct this issue ?
Thanks
Olivier _________________ Olivier - Moderator
Dslr : Olympus Pen E-P2 - Fujifilm X-Pro2 - Canon 5D MkII.
SLr and MF lenses : for feedback and helping people, cameras and lenses I own : full list here http://forum.mflenses.com/viewtopic,p,1442740.html#1442740 |
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Attila
Joined: 24 Feb 2007 Posts: 57865 Location: Hungary
Expire: 2025-11-18
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Posted: Sat Aug 29, 2009 8:55 pm Post subject: Re: AF confirm adapter / front focus |
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Attila wrote:
Olivier wrote: |
Hello,
I got a PK to EOS AF confirm adapter and unfortunarely it suffers from front focus. No way to focus well with it.
I understand the chip must be calibrated. It's not sold as a programmable chip, so is there any way to correct this issue ?
Thanks
Olivier |
Drop a pm to our member VGR , he is the developer of AF chip for 4/3 cameras. He is an expert on this area. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Olivier
Joined: 18 Feb 2009 Posts: 5078 Location: France
Expire: 2015-08-06
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Posted: Sat Aug 29, 2009 10:10 pm Post subject: |
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Olivier wrote:
OK Attila.
Than you very much. _________________ Olivier - Moderator
Dslr : Olympus Pen E-P2 - Fujifilm X-Pro2 - Canon 5D MkII.
SLr and MF lenses : for feedback and helping people, cameras and lenses I own : full list here http://forum.mflenses.com/viewtopic,p,1442740.html#1442740 |
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aoleg
Joined: 22 Feb 2008 Posts: 1387 Location: Berlin, DE
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Posted: Mon Aug 31, 2009 4:21 am Post subject: Re: AF confirm adapter / front focus |
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aoleg wrote:
Olivier wrote: |
I understand the chip must be calibrated. It's not sold as a programmable chip, so is there any way to correct this issue ? |
I only had a chip like that once. Yes, this can happen with them quite easily. If the chip itself is not the newer programmable type, your only resort would be applying the in-camera AF correction for a given focal length-aperture combination. If you have other chips with the same focal/aperture, it's easier to sell the affected one and get another one, without an error, instead. _________________ List of lenses |
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Olivier
Joined: 18 Feb 2009 Posts: 5078 Location: France
Expire: 2015-08-06
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Posted: Mon Aug 31, 2009 8:39 am Post subject: Re: AF confirm adapter / front focus |
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Olivier wrote:
Seller told me he's very sorry and proposes me to send it back to get a refund or a replacement.
I'll do that.
Thanks Aoleg
aoleg wrote: |
I only had a chip like that once. Yes, this can happen with them quite easily. If the chip itself is not the newer programmable type, your only resort would be applying the in-camera AF correction for a given focal length-aperture combination. If you have other chips with the same focal/aperture, it's easier to sell the affected one and get another one, without an error, instead. |
_________________ Olivier - Moderator
Dslr : Olympus Pen E-P2 - Fujifilm X-Pro2 - Canon 5D MkII.
SLr and MF lenses : for feedback and helping people, cameras and lenses I own : full list here http://forum.mflenses.com/viewtopic,p,1442740.html#1442740 |
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