DXOMark scores
Posted 24/11/2013 - 15:34
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Lenses have a character as well as technical results. It may also be that some excel at distances that are not conducive to photographing test charts. It could also be that an ideal portrait lens, for example, had relatively poor definition. Our subjects might appreciate it.
There's much more to lenses than lens tests, just take it as one aspect.
There's much more to lenses than lens tests, just take it as one aspect.
Best regards, John
Posted 24/11/2013 - 15:39
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I can see a major flaw in those figures. They are tested in conjunction with different camera bodies and really they need to all be re-tested with the new K-3. My concern with current lens testing is that it tests the whole lens/sensor combination rather than just the lens. So as cameras improve the whole performance of the lens might change as a result.
Best regards, John
Posted 24/11/2013 - 15:47
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Agreed John. The now notorious German test of the DA 18-135 being a case in point of this, so many people have commented on how good that lens is. My own real world experience of the DA 50 is that it's a cracking lens with lots of contrast and the colour reproduction which we all like about Pentax lenses.
Cheers Paul
Pentax K5, DA 18-55 WR, DA 18-135 WR, DA 55-300 ED, DA 35 f2.8 Macro Limited, A 50 f1.7, DA 50 f1.8
Samsung GX10, D-Xenon 18-55, SEF-36PZF Flash
Sigma 10-20 EX DC f4-5.6
Pentax K5, DA 18-55 WR, DA 18-135 WR, DA 55-300 ED, DA 35 f2.8 Macro Limited, A 50 f1.7, DA 50 f1.8
Samsung GX10, D-Xenon 18-55, SEF-36PZF Flash
Sigma 10-20 EX DC f4-5.6
Posted 25/11/2013 - 22:03
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Quote:
I can see a major flaw in those figures. They are tested in conjunction with different camera bodies and really they need to all be re-tested with the new K-3.
You can select the camera body, say Pentax K5 and the DA 50 f1.8 is second. You can also click on "Optical Metric Score" and it shows scores for Sharpness, Distortion, Vignetting, Transmission, Chrom Aberration, I can see a major flaw in those figures. They are tested in conjunction with different camera bodies and really they need to all be re-tested with the new K-3.
Regards
Jeff
Posted 25/11/2013 - 22:11
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The point I was making Jeff was that as cameras improve, so we should really re-test all lenses with the new cameras. Not a very practical proposition I fear.
It was never a problem with film as testers either used the aerial image from the lens or a very fine grained film such as Kodak Technical Pan. At one time that was a relatively stable test material over many years.
It was never a problem with film as testers either used the aerial image from the lens or a very fine grained film such as Kodak Technical Pan. At one time that was a relatively stable test material over many years.
Best regards, John
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321 posts
15 years
Plymouth
I don't really understand this as even the limiteds and DA* don't do well.
Should I ignore these results or is there a simple explaination.
Regards
Jeff