Has anyone else noticed lens resolution issues with the K-5?

I only ask, as some lenses I have have been perfectly fine with the DS/K10D/K20D, but with the K-5 images are softer or the AF cannot cope etc. Ironically my Prime lenses are still stunning!

Specifically (so far)
Sigma 55-200 DC F4-5.6 (Budget lens, so not surprising)
Sigma 170-500 DG APO - Can't keep up with the AF in certain circumstances
DA 16-45 F4 - Sharpness trail-off to the edges, even at F8

The sigma 24-70mm EX F2.8 and DA* 50-135mm are more than a match for the K-5 though.

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Some Cameras

I've not noticed any such difference between my old GX20 and K5.

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lemmy
My Home Pages, Cartoons and Videos

Well I never thought I would see that said about a Pentax camera.

Mine all seem fine.

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. My Flickr

A sensor that outresolves all your lenses doesn't sound much of a problem to me!

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[link=https://500px.com/will_brealey/[/link]

My Siggy 24-70 is great now, with some adjustment. The sharpening I need in GIMP is a lot less with the K5 - and that's also with MF

Bret

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my pics: link
my kit: K3, K5, K-01, DA 18-55, D-FA50 macro, Siggy 30/1.4, 100-300/f4, 70-200/2.8, Samsung 12-24/f4, Tamron 17-50, and lots of other bits.