Email: brqyvn@gmail.com
Best Regards,
Yvon Bourque
Hi Photographer friends,
Have you ever had any back or front focusing problems with your DSLR? It's not an uncommon problem with all brands of DSLR cameras. The tolerance of factory settings are often the cause, but most often, it's caused because the light coming into the camera lens is first reflected onto the mirror and through the prism . If the distance from the mirror center to the Matte glass (A) is slightly different than the distance from the mirror center to the sensor surface (B), or from the mirror center to the AF detectors (C), you will have a back or front focusing problem. That's a lot of elements that have to be just right to work homogeneously.
Well, the Pentax K-01 can solve that problem. The K-01 is not necessarily the fastest auto focus camera in the world, but AF speed and front/back focusing are completely different problems.
Well, the Pentax K-01 can solve that problem. The K-01 is not necessarily the fastest auto focus camera in the world, but AF speed and front/back focusing are completely different problems.
The mirror less cameras don't have front or back focusing problems because they don't have any mirror in the pathway.
That's another reason why I do like the K-01. Admittedly, I would have like an Optical Viewfinder, (OVF) and actually you can use any OVF from other manufacturers, as long as they fit on the flash bracket and the angle of view matches that of the the lens you are using. See examples here and here
I just thought this would be interesting for the photographers complaining about front or back focusing.
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| Image from Nikon. |
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| Image from Samsung |
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| Image from Pentax |
I just thought this would be interesting for the photographers complaining about front or back focusing.
Best Regards,
Yvon Bourque
1 comment:
Yvon, having considered K-01 with certain care I chose to buy another K-5, this time with Canon ee-S focusing screen adapted and properly shimmed. I can hit my kids eyes with my SMCP A 50/1.2 and AF is accurate with all my lenses. Obviously one sample cannot prove a claim, but personally I find K-01 a good attempt, but still not there. A retro-looking range-finder like camera with excellent electronic viewfinder and thin (sans the mount point) body could have done it for me, but not this design.
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