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Archive 2013 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison
  
 
skibum5
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p.1 #1 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison


this guy compared them only done at 24mm and 70mm

http://blog.ketangajria.com/2013/01/ef-24-70mm-f4l-is-24-105mm-f4l-is.html


(of course it is very tricky to carry out such tests though as slight difference in placement of focus even at f/8 make alter things and so can where field curvature falls and how it fits a particular scene)



Jan 13, 2013 at 06:24 AM
watson83
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p.1 #2 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison


There is a pretty extensive comparison at learningcameras.com

There is a 24-70 f/4 review: http://learningcameras.com/reviews/7-lenses/99-canon-24-70-f4-is-review

24-70 f/4 comparison with the 24-105mm
http://www.youtube.com/watch?v=yJWqOeEkfOA

and a comparison between the Canon 24-70 f/4 is and the Tamron 24-70 f/2.8 VC
http://www.youtube.com/watch?v=4nMmX7_ua_w



Jan 17, 2013 at 07:38 PM
gdanmitchell
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p.1 #3 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison


watson83 wrote:
There is a 24-70 f/4 review: http://learningcameras.com/reviews/7-lenses/99-canon-24-70-f4-is-review


I'm a bit skeptical of that source.

For example: "...the reduction in chromatic abrasion"!? ;-)

And: "Sharpness has been an area that Canon has been improving on consistently with the new lenses they have been introducing, and thankfully, the Canon 24-70mm f/4 IS is a slight exception." Huh? ;-)

Dan



Jan 17, 2013 at 08:11 PM
Wahoowa
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p.1 #4 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison


I find the comparison at LensRentals.com is the most accurate one. They tested by reading and averaging MTF values from a bunch of samples they had there.

http://www.lensrentals.com/blog/2013/01/canon-24-70-f4-is-resolution-tests

I understand that, at the end, it's all about real-world tests. But, taking photos of random subjects and then "to the eyes of the tester", not sure I can honestly say it's a valid comparison.

Anyway, appreciate the link though.



Jan 17, 2013 at 08:30 PM
 

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Legion5
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p.1 #5 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison


Wahoowa wrote:
I find the comparison at LensRentals.com is the most accurate one. They tested by reading and averaging MTF values from a bunch of samples they had there.

http://www.lensrentals.com/blog/2013/01/canon-24-70-f4-is-resolution-tests

I understand that, at the end, it's all about real-world tests. But, taking photos of random subjects and then "to the eyes of the tester", not sure I can honestly say it's a valid comparison.

Anyway, appreciate the link though.



Tests are best done when using both MTF and visual comparison while focusing in live view with multiple re-focusing atempts and cross refferencing both MTF and visual comparison. I test lenses that way and that's just for my own purposes:

http://www.fredmiranda.com/forum/topic/1181263/0#11261540

Anyone can take the time to do it, it's not hard. Just download a simple MTF program and print out a test chart on a large format printer at your favorite printing place.

I have a test chart permanently glued between two sheets of glass from home depot in my utility closet.

Total cost and time involved $60 and 4 hours of work.

I clicked on this link to see if anyone else tested this lens at 50mm, as 5/6 copies that I'm aware of that have tested this length have shown that it performs very poorly in the middle of the focal range (much worse the than 24-105mm). It seems that nobody even thinks to test lenses anywhere but at the extreme wide and telephoto ends based on the reviews posted here.

It's a shame, I'm holding out hope that if you were to buy 4 or more copies one would not have any issues at 50mm.



Jan 17, 2013 at 08:55 PM
skibum5
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p.1 #6 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison


gdanmitchell wrote:
And: "Sharpness has been an area that Canon has been improving on consistently with the new lenses they have been introducing, and thankfully, the Canon 24-70mm f/4 IS is a slight exception." Huh? ;-)

Dan


hah
hopefully he just had a brain freeze and meant "is no exception"
(and hopefully it wasn't a slip revealing his actual true feelings about the new lens compared to the 24-105 underneath some marketing link hooey or something hah)



Jan 17, 2013 at 11:41 PM
gdanmitchell
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p.1 #7 · another 24-70 f/4 IS vs 24-105 f/4 IS comparison


Wahoowa wrote:
I find the comparison at LensRentals.com is the most accurate one.


I agree with you about LensRentals.com. The folks there have consistently provided a lot of useful and thoughtful information.

Dan



Jan 18, 2013 at 01:20 AM





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