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04-18-2012, 02:50 AM   #1
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Auto auto focus adjustment

How hard would it be to code something like that?
Todays camera can use 2 different kind of AF, phase AF and contrast AF.
Contrast AF doesn't need any focus adjustment so can't the Phase AF not use that as "zero"/calibration point?

You put the camera on tripod, use contrast AF to focus on AF test chart, the chart would be in perfect focus then so any deviation the camera sees in the focus when it looks at it with the Phase AF is the amount it needs to adjust.
Or to simply say it, the focus the phase AF sees then is the perfect focus for that lens and Phase AF should use that point from now on.

Why don't we have something like this yet?

04-18-2012, 03:43 AM   #2
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i was wondering the same a week ago when calibrating my DA*55.

I'm sure it may not be that much complicated to code, and it would be so usefull for people that can't enter different calibration in the body (like me with my K-x)

Maybe we should send a mail to Pentax japan to give them this idea
04-18-2012, 04:17 AM   #3
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Or maybe patent it first
04-18-2012, 09:45 AM   #4
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Well, technically it's your idea, or at least, you' re the first to express it in public, so you're legally the conceptor so far.

04-18-2012, 11:22 AM   #5
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QuoteOriginally posted by aurele Quote
Well, technically it's your idea, or at least, you' re the first to express it in public, so you're legally the conceptor so far.
First to file and first to invent - Wikipedia, the free encyclopedia


----

I guess maybe you do a contrast detect or manual focus, and then adjust the offset until the phase detect reads a minimal (hopefully 0) change in distance. I think I've thought of this or something along those lines with a manual focus before, but not with contrast-based focus. Then again, I'm still using a K10D.
04-18-2012, 03:01 PM   #6
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Well, Anvh, you should patent your invention Cause with all the DSLR sold in the world, you have a gold mine here
04-18-2012, 03:34 PM   #7
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This exists for Canon and Nikon users Reikan FoCal - Automatic AF Microadjustment Software. How does fully automated AF adjustment via tethering sound?

Last edited by twitch; 04-18-2012 at 03:44 PM.
04-18-2012, 03:39 PM   #8
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Pentax really need to open it's firmware then !

04-18-2012, 10:58 PM   #9
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Just a quick word about patents. My understanding is that, once you've disclosed an idea to a third party, you won't be able to get it patented.

Nevertheless, a darn' good idea!
04-19-2012, 12:49 AM   #10
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QuoteOriginally posted by aurele Quote
Pentax really need to open it's firmware then !
Some have made the firmware readable but would love to see pentax bringing out an SDK, it won't hurt them just look what it did for the GH2 for example.
And they can of course copy all the good codes and use it for their own
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