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Return of Interesting article on DxO about 5D III and D800...

Started Apr 10, 2013 | Discussions thread
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Steen Bay
Veteran MemberPosts: 6,792
Re: True that
In reply to Mako2011, Apr 14, 2013

Mako2011 wrote:

Just another Canon shooter wrote:

MAC wrote:

Mako2011 wrote:

Just another Canon shooter wrote:

BTW, the real test should be at equivalent FL and equivalent f-stops with common lenses.

When comparing resolution across formats you have to keep the subject distance constant. DxO apparently doesn't do that. Might be a source of some of their inconsistencies

true !

Wrong, actually. They have one chart. When they test equivalent FL's they shoot from the same distance.

Actually not the case at all when they test lens. They do shoot from different distances depending on format. Strange of them. Might be why the no longer publish the charts as well.  Hard to explain their methodology of late.

They also shoot from different distances depending on the FL when testing lenses on FF. Is that unfair? What else should they do? The 300/2.8L II doesn't seem to suffer much from the greater distance.

Too bad they replaced the MTF charts with the meaningless one number tells it all metric.

True that.

Fortunately, in sharpness/profiles we can also see the "Acutance for use case in %" (whatever that's supposed to mean..) across the frame at different FLs and f-stops.

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