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Archive 2012 · 24-70 II MTF charts on FF hint at astounding IQ
  
 
skibum5
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p.1 #1 · p.1 #1 · 24-70 II MTF charts on FF hint at astounding IQ


Shockingly, it seems that the 70mm performance will even beat that of the Canon 70-200 2.8 IS II at f/2.8 and it will do the same at f/8 other than in the corners.

No standard range Canon zoom has ever had FF MTF charts to match those of the 70-200 line (or new 70-300L) but the new 24-70s charts do. At wide and tele end.

The charts for it look better at 24mm than those from the new 24 2.8 IS prime at f/2.8 and f/8 and the 24 1.4 II at f/8 (can't compare at f/2.8 since no chart avail for 24 1.4 at that aperture).

The charts for it looks radically better at f/2.8 at both ends of the range than for the orignal 24-70. And much better at f/8 and 24mm and better at f/8 and 70mm.

Granted they may not tell the full story and perhaps not even the true story at all, but they certainly hint at the possibility of amazing performance.

Take it with a grain of salt, but there certainly seems to be some reason to be very optimistic about the new zoom hitting fantastic levels of image quality and being very noticeably better than the current version.



Feb 07, 2012 at 07:33 AM
Fred Miranda
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p.1 #2 · p.1 #2 · 24-70 II MTF charts on FF hint at astounding IQ


skibum5 wrote:
Shockingly, it seems that the 70mm performance will even beat that of the Canon 70-200 2.8 IS II at f/2.8 and it will do the same at f/8 other than in the corners.

No standard range Canon zoom has ever had FF MTF charts to match those of the 70-200 line (or new 70-300L) but the new 24-70s charts do. At wide and tele end.

The charts for it look better at 24mm than those from the new 24 2.8 IS prime at f/2.8 and f/8 and the 24 1.4 II at f/8 (can't compare at f/2.8 since no chart avail for
...Show more

Now we just need a high MP body to attach to it.



Feb 07, 2012 at 08:07 AM
RazorTM
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p.1 #3 · p.1 #3 · 24-70 II MTF charts on FF hint at astounding IQ


If Canon does end up producing a Nikon D800-equivalent camera, then I can sell all my lenses but the 70-200 2.8 IS II and 85L, grab this lens, and be set for life


Feb 07, 2012 at 08:11 AM
skibum5
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p.1 #4 · p.1 #4 · 24-70 II MTF charts on FF hint at astounding IQ


RazorTM wrote:
If Canon does end up producing a Nikon D800-equivalent camera, then I can sell all my lenses but the 70-200 2.8 IS II and 85L, grab this lens, and be set for life






Feb 07, 2012 at 08:21 AM
alundeb
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p.1 #5 · p.1 #5 · 24-70 II MTF charts on FF hint at astounding IQ


Wowsers!

The drop in tangential MTF relative to sagittal even stopped down suggests quite a bit of lateral CA though.

And +1000000 to Fred, we need a high MP camera to attach to it.



Feb 07, 2012 at 08:25 AM
Daan B
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p.1 #6 · p.1 #6 · 24-70 II MTF charts on FF hint at astounding IQ


Looks good...


Feb 07, 2012 at 08:26 AM
alundeb
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p.1 #7 · p.1 #7 · 24-70 II MTF charts on FF hint at astounding IQ


Link to MTFs:

http://usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_24_70mm_f_2_8l_ii_usm?WT.mc_id=C126149



Feb 07, 2012 at 08:27 AM
Daan B
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p.1 #8 · p.1 #8 · 24-70 II MTF charts on FF hint at astounding IQ


... and expensive.


Feb 07, 2012 at 08:27 AM
SKumar25
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p.1 #9 · p.1 #9 · 24-70 II MTF charts on FF hint at astounding IQ


From the press release: "Class-leading performance, unrivalled flexibility". Not too often does Canon declare a product a class leader. Should be a top performer. Hopefully in the league of the 70-200 IS II.


Feb 07, 2012 at 08:54 AM
kewlcanon
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p.1 #10 · p.1 #10 · 24-70 II MTF charts on FF hint at astounding IQ


It has to be in 70-200 IS II class for that kind of price.


Feb 07, 2012 at 12:20 PM
 

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S Dilworth
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p.1 #11 · p.1 #11 · 24-70 II MTF charts on FF hint at astounding IQ


alundeb wrote:
The drop in tangential MTF relative to sagittal even stopped down suggests quite a bit of lateral CA though.


But do we know Canon uses white light for these MTF charts? It looks like diffraction is ignored, resulting in the impossible claims for on-axis f/8 performance. Who knows what else is ignored.

Since Canon doesn't provide any meaningful specifications for what it shows in its MTF charts — even in EF Lens Work — I just ignore them. They could be showing almost anything!

Of course I do expect the new 24-70 mm to be a significant step up in overall optical performance compared to the old lens.



Feb 07, 2012 at 02:12 PM
Jeff
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p.1 #12 · p.1 #12 · 24-70 II MTF charts on FF hint at astounding IQ


SKumar25 wrote:
From the press release: "Class-leading performance, unrivalled flexibility". Not too often does Canon declare a product a class leader. Should be a top performer. Hopefully in the league of the 70-200 IS II.


SKumar25 wrote:
From the press release: "Class-leading performance, unrivalled flexibility". Not too often does Canon declare a product a class leader. Should be a top performer. Hopefully in the league of the 70-200 IS II.


Hopefully. I think I recall Canon declaring the 1D MkIII a class leader before it was released.



Feb 07, 2012 at 02:22 PM
deepbluejh
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p.1 #13 · p.1 #13 · 24-70 II MTF charts on FF hint at astounding IQ


Any feedback on how the new 24-70L compares to the Nikon equivalent?


Feb 07, 2012 at 02:25 PM
jerrykur
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p.1 #14 · p.1 #14 · 24-70 II MTF charts on FF hint at astounding IQ


Very impressive. I can see where they spent all that money.


Feb 07, 2012 at 02:28 PM
alundeb
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p.1 #15 · p.1 #15 · 24-70 II MTF charts on FF hint at astounding IQ


S Dilworth wrote:
But do we know Canon uses white light for these MTF charts? It looks like diffraction is ignored, resulting in the impossible claims for on-axis f/8 performance. Who knows what else is ignored.

Since Canon doesn't provide any meaningful specifications for what it shows in its MTF charts — even in EF Lens Work — I just ignore them. They could be showing almost anything!

Of course I do expect the new 24-70 mm to be a significant step up in overall optical performance compared to the old lens.


Yeah, the Canon MTF's are not very reliable. Dang if they use monochromatic light as well for their MTF model. But we will see. Empirically, it would be out of this world good if they got the lateral color below 1 pixel for all focal lengths on the 5DII.



Feb 07, 2012 at 02:53 PM
rosscova
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p.1 #16 · p.1 #16 · 24-70 II MTF charts on FF hint at astounding IQ


alundeb wrote:
The drop in tangential MTF relative to sagittal even stopped down suggests quite a bit of lateral CA though.


Reading that I can't help but hear the voice of Sheldon Cooper in my head.



Feb 07, 2012 at 02:55 PM
alundeb
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p.1 #17 · p.1 #17 · 24-70 II MTF charts on FF hint at astounding IQ


rosscova wrote:
Reading that I can't help but hear the voice of Sheldon Cooper in my head.





Feb 07, 2012 at 03:07 PM
Will Patterson
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p.1 #18 · p.1 #18 · 24-70 II MTF charts on FF hint at astounding IQ


Fred Miranda wrote:
Now we just need a high MP body to attach to it.



What's funny is I remember reading a lot of "24 megapixels is plenty, let's start concentrating on IQ and better high ISO noise" and now everyone is drooling over the D800's 36Mp. I really don't care about huge Mp, I want better IQ which is why I really like the idea of the 1D X at 18Mp.



Feb 07, 2012 at 03:18 PM
alundeb
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p.1 #19 · p.1 #19 · 24-70 II MTF charts on FF hint at astounding IQ


Will Patterson wrote:
What's funny is I remember reading a lot of "24 megapixels is plenty, let's start concentrating on IQ and better high ISO noise" and now everyone is drooling over the D800's 36Mp. I really don't care about huge Mp, I want better IQ which is why I really like the idea of the 1D X at 18Mp.


The D800 is all about IQ. Did you see the ISO 640 sample? Downsample to your favourite resolution in your first processing step and it will not stand back for the 1D X in IQ.

In addition, the D800E with the self-cancelling low-pass filter will yield better micro contrast out of the camera. This means that less sharpening has to be done, and you can tolerate more noise in your original file. The importance of this is often overlooked, and it can amount to one full stop of ISO performance.



Feb 07, 2012 at 03:32 PM
thw2
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p.1 #20 · p.1 #20 · 24-70 II MTF charts on FF hint at astounding IQ


If the field performance of this lens is as impressive as what Canon marketing wants us to believe, then Canon is really the king of the hill. So far, the Nikon and Zeiss equivalents are hardly impressive

Oh, and those snobs and fanboys who claim that Canon cannot design high quality wide to normal lenses can go eat some crow.

Waiting for some reliable reviews... DPReview? Photozone? the-digital-picture?



Feb 07, 2012 at 04:12 PM
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