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Author Topic: your comparison is INVALID  (Read 746 times)
itinko
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« on: April 05, 2013, 04:29:55 PM »

This a comment for this page on the website
Why would you compare a Canon body with premium lenses to Nikon's body "when that camera is used with less capable lenses"?? Sounds like th MKIII is feeling a bit insecure?
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verysimplejason
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« Reply #1 on: April 07, 2013, 07:53:28 AM »

Then what kind of comparison do you want?  Do you use your camera and lens separately?  They've tested the best lenses available for both systems.  Isn't that enough?  They've also used the same third party lenses when available for both systems.  Tell us why do you think this is invalid...
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Chris Newman
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« Reply #2 on: April 07, 2013, 09:57:26 AM »

Comparing competing Canon and Nikon body and lens combinations is helpful for anyone wanting to choose a system.  Comparing high quality, supposedly identical third-party lenses on Canon and Nikon bodies should give a comparison of the capabilities of the bodies.  But the Sigma 35mm F1.4 DG HSM A scored 23P-Mpix on the Nikon D800 and 19P-Mpix on the Canon 5D Mk III (4 point advantage to Nikon), yet the Sigma 85mm F1.4 EX DG HSM scored 18P-Mpix on the Nikon D800 and 20P-Mpix on the Canon 5D Mk III (2 point advantage to Canon).  This suggests either variations in the copies of the lenses or experimental error.

Commenting on the average scores for third-party lenses that were tested on both bodies would be useful.  But comparing averages made up of different lenses (85 on Canon but only 62 on Nikon) could be misleading.  The statement “the Canon EOS 5D Mark III occupies no less than 3 positions out of the Top 10” (for Sharpness scores) is highly misleading, because all 3 top scores were on the Canon EF 300mm f/2.8L IS II USM.  The longest Nikon prime DxO give results for is the 105mm macro.
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