On-sensor PDAF, will it be as good as mirrored cameras?

Started Oct 10, 2013 | Discussions thread
Bruce Oudekerk
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In reply to Bruce Oudekerk, Oct 12, 2013

Instead of talking about it...I searched around and dug up an early 70's vintage manual focus Vivitar 200mm f3.5 prime that I had lying around. I hadn't even looked at this lens in 15 or 20 years.

When I close focused, it cantilevered out across the room and I was shocked. At an arbitrary focal distance of approximately 9 feet it had extended 17mm. I didn't bother measuring its actual MFD as I was too disheartened.

The whole z axis process might work but it will have limitations I hadn't fully anticipated.

Bruce

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