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12-04-2009, 12:15 PM   #1
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Lenses that work with K-7's corrections Q

With my FA 43 f/1.9 on my K-7, you cannot enable distortion correction and chromatic aberration correction, also I'm not sure if it limits anything else.

So I have a bit of a question, what kind of lenses do and do not work with the K-7's distortion and chromatic aberration correction software? Is it full frame lenses, what is it exactly? Also will third party lenses work with the K-7's corrections?

12-04-2009, 12:32 PM   #2
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QuoteOriginally posted by LeDave Quote
With my FA 43 f/1.9 on my K-7, you cannot enable distortion correction and chromatic aberration correction, also I'm not sure if it limits anything else.

So I have a bit of a question, what kind of lenses do and do not work with the K-7's distortion and chromatic aberration correction software? Is it full frame lenses, what is it exactly? Also will third party lenses work with the K-7's corrections?
Not compatible with 3-rd party lenses. From Pentax Imaging:
A Lens Correction function adjusts for Distortion and Lateral Chromatic Aberrations, allowing you to maximize your image quality for every digital lens.*

"*Compatible with D FA, DA, DA Limited and DA Star lenses. Distortion correction is not applied to the DA 10-17mm Fisheye lens."
12-04-2009, 02:13 PM   #3
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I think tamron 17-50 and 70-200 2.8 can use the k-7 features.
12-04-2009, 02:36 PM   #4
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QuoteOriginally posted by netuser Quote
I think tamron 17-50 and 70-200 2.8 can use the k-7 features.
I'd like to see a link to some proof, because nothing I've read would agree with that.

12-04-2009, 02:51 PM   #5
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QuoteOriginally posted by audiobomber Quote
I'd like to see a link to some proof, because nothing I've read would agree with that.

Link ? not needed

I just tried with tamron 17-50 2.8 and yes, it uses the k-7 features (distortion and chromatic aberration correction software). Also highlight and shadow.
12-04-2009, 03:24 PM   #6
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QuoteOriginally posted by netuser Quote
Link ? not needed

I just tried with tamron 17-50 2.8 and yes, it uses the k-7 features (distortion and chromatic aberration correction software). Also highlight and shadow.
Don't mean to be a bother, but would you post a photo showing an uncorrected and corrected image? Some people reported that a Sigma lens was recognized but no corrections actually applied. I would think the barrel distortion at 17mm would need some pretty heavy correction.
12-04-2009, 04:00 PM   #7
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I just took a image againt my tv lol. I'm not an expert but FA lenses I have etc I can't select the features, with tamron I can.
12-04-2009, 05:24 PM   #8
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QuoteOriginally posted by netuser Quote
I just took a image againt my tv lol. I'm not an expert but FA lenses I have etc I can't select the features, with tamron I can.
That's what I've heard, with off-brand digital lenses the camera shows the correction feature, but doesn't actually do any processing.

12-04-2009, 07:07 PM   #9
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QuoteOriginally posted by LeDave Quote
So I have a bit of a question, what kind of lenses do and do not work with the K-7's distortion and chromatic aberration correction software? Is it full frame lenses, what is it exactly? Also will third party lenses work with the K-7's corrections?
I think Pentax made a clear statement on it a while back, but I can't find the link.

Distortion and Chromatic Aberration correction only works with DA/DA* and DFA lenses. The feature needs some electronic data from the lens which only these newer lenses have. The feature cannot be supported with FA lenses.
12-04-2009, 08:11 PM   #10
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the Kx supports it too I see.
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