Re(4): zum Canon 50/1.4
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.  Re: 3 gute Nachrichten für Canon User ...  (iraki am 02.09.2008, 15:53:07)
.  Re: zum Canon 50/1.4  (iraki am 02.09.2008, 16:46:51)
..  Re(2): zum Canon 50/1.4  (Alpenländer am 02.09.2008, 16:53:03)
...  Re(3): zum Canon 50/1.4  (jo0815 am 02.09.2008, 17:10:20)
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Re(4): zum Canon 50/1.4
02.09.2008, 17:22:34
Sind Pentax-Knipser anspruchsvoller? ^^


das sowieso! ;-) :-)

zur Frage: http://www.photozone.de/lens-test-faq

Zitat:
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Q: Are the figures comparable between cameras or different systems ?
It depends on the similarities between the image sensor system. A sensor SYSTEM contains the image sensor with or without micro-lenses, an IR filter, a low-pass (Moire) filter and the signal processing. As you can imagine the output quality is largely dependent on the whole chain on not just on the amount of megapixels. The different output quality between the Canon EOS 350D and the Olympus E-300 is a good example (despite a 8MP sensor). The tests are a good guidance for the lens quality as long as you compare the results WITHIN a test group (e.g. Canon).
Here're a few tendencies:


the Pentax results are a bit steeper (sharper and softer results are more pronounced). The tangentially resolution is a bit favored due to the extremely weak vertical AA filter.
the Canon results tend to be a bit better at the extreme borders due to the smaller sensor
the Olympus results are comparatively weak due to the aggressive AA filter on the E-300

Q: Why are the quality ratings different from system to system ?
As mentioned above the lens quality is affected by the sensor "system". Every additional step in the pipeline decreases the output quality, specifically the low-pass filter in front of the sensor. Assuming you mount the same lens on different system its maximum resolution will vary according to the max. quality of the sensor system. There're also evolutions regarding the RAW converter quality so more recent system tests starts can benefit from this - e.g. Canon/Olympus RAWs are/were converted using ACR 3.2 whereas Pentax/Sony RAWs are/were converted via ACR 3.7 and there was an increase in converter quality with ACR 3.4). This must all be taken into account regarding the rating system.
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Wow...that's a pretty killer camera! Are you any good?

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.....  Re(5): zum Canon 50/1.4  (jo0815 am 02.09.2008, 17:37:13)
.  Re: 3 gute Nachrichten für Canon User ...  (Spedi am 02.09.2008, 19:49:20)
 

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