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Author Topic: DXO tests the Canon 500 II and 600 II lenses  (Read 6517 times)

ddashti

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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #15 on: May 30, 2013, 02:44:53 PM »
I still feel like DxO's tests are geared more toward Nikon stuff.
They have good information, though.

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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #15 on: May 30, 2013, 02:44:53 PM »

neuroanatomist

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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #16 on: May 30, 2013, 06:02:32 PM »
Mikeal, you were asked a direct, specific question:

Please explain.  The Canon MTF charts have both thin and thick lines.  I thought the thick lines corresponded to 10 lp/mm and that the thin lines corresponded to 30 lp/mm.  We're not comparing thick from one lens to thin on the other.  Unless you are saying that what the thick and thin lines represent (x lp/mm) varies depending on the Canon lens focal length.  Does it?

You respond with:

If you look at common  motive the 10Lp/mm  frequency makes up 57% of the total assessment, while 20 lp/mm counts for 29%, and 40 lp/mm 14%.
So I think both Canon and Nikon knows what they are doing when they calculate what a 500mm or 600mm often be used to.

...which is a tangential response that basically repeats an earlier post but does not answer the question being asked.
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Don Haines

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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #17 on: May 30, 2013, 06:33:06 PM »
I don't trust DxoMark and the scores that they assign to lenses....

Look at the Canon 600mm F4 while mounted on a 5D3.... Dxo rating is 26.

There are higher rated Canon lenses you can buy....

Canon 50mm F1.8 while mounted on a 5D3..... Dxo rating is 28.

That's right.... the cheapest lens Canon makes is rated higher than their most expensive lens.... OK people, who wants to swap their 600F4 for my 50F1.8? Even though the 50 is a better lens I'll swap you even....
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neuroanatomist

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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #18 on: May 30, 2013, 06:40:24 PM »
I don't trust DxoMark and the scores that they assign to lenses....

Look at the Canon 600mm F4 while mounted on a 5D3.... Dxo rating is 26.

There are higher rated Canon lenses you can buy....

Canon 50mm F1.8 while mounted on a 5D3..... Dxo rating is 28.

That's right.... the cheapest lens Canon makes is rated higher than their most expensive lens.... OK people, who wants to swap their 600F4 for my 50F1.8? Even though the 50 is a better lens I'll swap you even....

This is my earlier point - their Scores are useless. However, their Measurements are generally useful.
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GMCPhotographics

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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #20 on: May 31, 2013, 06:21:57 AM »
I can't imagine any pro photographer who is about to lay down £10K for their new mkII white lens will give any consideration to the DXO fantasy lab metrics.
We all know that 400IIL is optically as good as the mkI but weighs a lot less. We all know the 500IIL is stupidly light and slightly better optically to the mkI (although i've never found the mkI lacking). We all know that the 600L wasn't the critically sharpest of the big whites when wide open (but still very sharp) but the mkII is noticably sharper. So what's the point in passing these lenses through their labs? They didn't bother with most of the mkI lenses.
With the mkI lenses, I felt that the 400L was the most versatile. It's one of the sharpest lenses ever to come out of the Canon stables and it took 1.4x and 2x converters better than most lenses. But it is very heavy, like the 600L. With the mkII lenses, while the 400IIL is just as versatile as the mkI....it's a lot lighter. But the real star in the current mkII line up (in my opinion) is the new 500IIL. It's SO light it opens a lot more options for handholding and is far easier to move around with it. Sure the new 200-400L looks nice, but it's very heavy and not much lighter than the 400IIL. Given the choice I'd go for a 500IIL or a 400IIL or a 600IIL in that decending order.
My opinion on DXO labs hasn't changed over the last 4 years. Their weighting for their point scores are heavily swung according to their own internal brand bias.

Don Haines

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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #21 on: May 31, 2013, 09:17:31 AM »
My opinion on DXO labs hasn't changed over the last 4 years. Their weighting for their point scores are heavily swung according to their own internal brand bias.

Bias is debateable... it may or may not be true.... but it appears to be.

What is not debateable is that an attempt to represent a complex system of interactions between diverse technologies and conflicting user requirements with a simple number is doomed to failure.
« Last Edit: May 31, 2013, 05:31:31 PM by Don Haines »
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Re: DXO tests the Canon 500 II and 600 II lenses
« Reply #21 on: May 31, 2013, 09:17:31 AM »