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AF confirm adapter / front focus
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PostPosted: Sat Aug 29, 2009 8:53 pm    Post subject: AF confirm adapter / front focus Reply with quote
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


PostPosted: Sat Aug 29, 2009 8:55 pm    Post subject: Re: AF confirm adapter / front focus Reply with quote
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.


PostPosted: Sat Aug 29, 2009 10:10 pm    Post subject: Reply with quote
OK Attila.
Than you very much.


PostPosted: Mon Aug 31, 2009 4:21 am    Post subject: Re: AF confirm adapter / front focus Reply with quote
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.


PostPosted: Mon Aug 31, 2009 8:39 am    Post subject: Re: AF confirm adapter / front focus Reply with quote
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.
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