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07-28-2014, 03:52 PM - 1 Like   #1
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Patents: Sensor shift AF, 80-160 for 645

A couple of interesting parents from Ricoh have been published.

The first one seems to be using sensor shift to assist focusing.
Ricoh ?????AF?AF???????????????????So-net??? (Japanese)

The second is for a 80-160mm f4.5 lens for the 645 series.
Ricoh 80-160mm F4.5(645)?????????????So-net??? (Japanese)

07-28-2014, 03:58 PM   #2
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seems plausible to me. move the sensor some instead of the glass
07-28-2014, 04:07 PM   #3
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QuoteOriginally posted by JPT Quote
A couple of interesting parents from Ricoh have been published.

The first one seems to be using sensor shift to assist focusing.
Ricoh ?????AF?AF???????????????????So-net??? (Japanese)
The possibility of autofocus with ANY lens, most likely just extremely fine focus.
07-28-2014, 04:08 PM   #4
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Pretty sure the focus shift would be implemented in a mirrorless body.

07-28-2014, 04:13 PM   #5
JPT
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No. I don't think it works like that. I think this method shifts the sensor a little to get information from two points to perform phase detect autofocus. In other words, instead of having some pixels on the sensor dedicated to PDAF or splitting each pixel in two (like Canon's dual pixel system), this idea moves the sensor to get the same information. It means Ricoh could have on sensor PDAF without having to make a specific sensor.
07-28-2014, 04:20 PM   #6
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Thanks for posting, quite interesting.
I agree, it's not AF-by-moving-the-sensor-back-and-forth (which would require extreme movements). The AF sensor (system?) is sitting on a SR platform, and its position can be moved to effectively move the AF points all over the frame, perhaps even in corners.
I assume it can be controlled by software, so a tracking system would be able to keep the central AF point on the subject - using information from the RGB metering system. It should also work fine with manual AF point selection.

This is just one of the technologies which can keep the DSLRs in the game.

P.S. I'll be fine with this in a "full frame" camera, combined with a variation of the K-3's AF.
07-28-2014, 04:23 PM   #7
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QuoteOriginally posted by Winder Quote
Pretty sure the focus shift would be implemented in a mirrorless body.
Yes. I think this is what it's designed for. K-02?
07-28-2014, 04:24 PM   #8
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I always thought about that...hey, move the sensor and add AF to any lens...
Maybe not in every camera, but a mirrorless with that feature would be AMAZING!

07-28-2014, 04:25 PM   #9
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Still innovating.. that is a welcome sight.

But I still want eye tracking in the VF where the camera focuses on whatever my eye is focused. haha
07-28-2014, 04:26 PM   #10
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QuoteOriginally posted by Kunzite Quote
Thanks for posting, quite interesting.
I agree, it's not AF-by-moving-the-sensor-back-and-forth (which would require extreme movements). The AF sensor (system?) is sitting on a SR platform, and its position can be moved to effectively move the AF points all over the frame, perhaps even in corners.
I assume it can be controlled by software, so a tracking system would be able to keep the central AF point on the subject - using information from the RGB metering system. It should also work fine with manual AF point selection.

This is just one of the technologies which can keep the DSLRs in the game.

P.S. I'll be fine with this in a "full frame" camera, combined with a variation of the K-3's AF.
Oh. In that case completely misread it!
07-28-2014, 04:34 PM   #11
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If I didn't misread it myself. It's late, I had to use Google Translate...
07-28-2014, 04:50 PM   #12
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QuoteOriginally posted by JPT Quote
A couple of interesting parents from Ricoh have been published.

The first one seems to be using sensor shift to assist focusing.
Ricoh ?????AF?AF???????????????????So-net??? (Japanese)

The second is for a 80-160mm f4.5 lens for the 645 series.
Ricoh 80-160mm F4.5(645)?????????????So-net??? (Japanese)
The zoom has shake reduction as opposed to the current FA* 80-160. At first I was wondering why they'd patent a lens they already have in the line up. They didn't, it is a new construction. Nive to see that they plan to continue supporting medium format!
07-28-2014, 05:02 PM   #13
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The way I read this patent is that it's lateral sensor shift and not longitudinal. This would allow ANY Pentax camera with SR to have this feature added via FW.
07-28-2014, 05:20 PM   #14
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The Contax AX film SLR used longitudinal movement of the film plane to provide AF, a patent to move a digital sensor in the same way for the same effect would probably be difficult to achieve I guess.
07-28-2014, 05:32 PM   #15
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By the way, 80-160mm matches pretty well the Tele Zoom from the 645 lens roadmap.
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