K10/K20 no rotational SR correction?

Started Jun 5, 2009 | Discussions thread
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jamesm007
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K10/K20 no rotational SR correction?
Jun 5, 2009

Here is an interesting quote from Imaging Resource in their preview of the K7

"For a while now, we've been under the impression that Pentax's Shake Reduction systems not only compensated for vertical and horizontal movement of the camera, but for rotation about the lens axis as well. As it turns out, this in fact wasn't the case, the misunderstanding apparently tracing back to a translation error on documentation for the original K-100D.

That earlier misapprehension unfortunately steals a little of the thunder from the news that the SR system in the new Pentax K-7 now does compensate for rotational movement. We don't know how much this is a factor in real-life shooting situations, as our the IS testing that we've begun over on SLRgear.com doesn't currently test for this. It makes sense that it could be an issue, though, when you consider what's likely to happen when you punch the shutter button a little too aggressively. Guidebooks have for years advised photographers to squeeze off their shots, as punching the shutter button tends to jostle the camera and produce blurred images. Since the shutter button is generally located on one side of the body, it's very likely that hitting it abruptly will produce some momentary rotation of the body about the axis of the lens. This is the just sort of movement that the K-7's new SR system can now compensate for. (As far as we know, it's the only IS system out there that does this.) Pentax claims that the K-7's sensor can rotate by as much + - 2 degrees to compensate for rotational > vibration."

Hmm all this time I thought the Pentax SR system in the K10 and K20 did compensate for rotational movement, but this was not the case? Whats the truth?

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