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09-28-2011, 05:41 PM - 1 Like   #1
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Sony-style AF coming?

I ran across this patent earlier and just couldn't help but wonder...could there be an alternative to Sony's translucent mirror AF be coming shortly to Pentax?

Of course it could already be in the ps models.

Here's the link: FOCUS DETECTION OPTICAL SYSTEM - Google Patents


It's still in the application stage...but that's when they make for an interesting read.

09-28-2011, 06:11 PM   #2
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I'm not going to pretend I understand this. If it was about processors and output channels, I might, but optics is not my forte (i.e. my current studies).

Could any body explain what the difference is between this and the traditional mini-sensor-and-optics phase detection autofocus?
09-28-2011, 07:40 PM   #3
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As far as I can see, this publication describes an improvement to phase detect AF system lenses. By reducing the distance between the separator lenses the phase detect unit is less susceptible to focus errors introduced as temperatures change. It will not bring "Sony-style AF" to Pentax.
09-29-2011, 03:38 AM   #4
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Ok. I misread the description. I thought it was using splitting optics to produce an image on both a phase detect focus sensor as well as an image on a normal CMOS sensor on the same plane (or chip).

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