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    ChrisAdval's Avatar
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    Default Sharpness Test Canon EF 50mm 1.8 vs. Canon EF 24-70mm 2.8 L

    a quick and dirty test just thought I'd share...

    They are unedited intentionally and as you maybe able to see they are somewhat underexposed.

    If you would like to see the uncompressed photo click the below individual photos...


    EF 24-70mm 2.8 L vs. EF 50 1.8 Canon - Side by Side by Chris Adval, on Flickr


    EF 50 1.8 Canon by Chris Adval, on Flickr


    EF 24-70mm 2.8 L by Chris Adval, on Flickr
    Last edited by ChrisAdval; 03-07-2012 at 12:03 AM.
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    Canon; 24-70 2.8L, 50 1.4, Tamron 70-200 2.8, 6D, 550D/T2i, 20D, and XSi.

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    The 24-70 definitely seems like a sharper lens. It seems to handle light better as well? I'm not sure if that's a lens difference or environmental one. Was the lighting situation changing? If so, that could have an effect on the contrast differences as well. The background perspective seems to have changed too. I'm assuming the 24-70 was shot at 50mm, and that the camera was the same distance from the subject?

    Definitely interesting test results
    Last edited by ArmySoldier777; 03-07-2012 at 12:19 AM.
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    ChrisAdval's Avatar
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    Quote Originally Posted by ArmySoldier777 View Post
    The 24-70 definitely seems like a sharper lens. It seems to handle light better as well? I'm not sure if that's a lens difference or environmental one. Was the lighting situation changing? If so, that could have an effect on the contrast differences as well. The background perspective seems to have changed too. I'm assuming the 24-70 was shot at 50mm, and that the camera was the same distance from the subject?

    Definitely interesting test results
    the focal length on the 24-70mm was shot in 24mm (with crop sensor difference field of view change to 50mm), but in the 50mm was shot in 50mm, on a crop sensor thats about 70-75mm field of view, what I should have done was shot the 24-70mm at 70, as mentioned it was a quick and dirty test when I got the lens today
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    Canon; 24-70 2.8L, 50 1.4, Tamron 70-200 2.8, 6D, 550D/T2i, 20D, and XSi.

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    Gotcha, that explains the perspective differences on the background then lol. The bokeh on on the 24-70 definitely looks better too, with more blades.

    It seems to have more of a flaring issue, but again, I'm wondering if that was a difference in environmental lighting between the two shots and not the lens itself. It does look like there's more direct sunlight in that example. I'm pretty impressed with the 24-70L though. I was looking at saving up and getting that lens next, but decided on the Tamron 17-50 instead.
    David
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    Camera: Canon 6D | Lens: Canon 24-105 F/4L , 70-200 F/4L, 50mm F/1.8, Samyang 14mm F/2.8 | Flashes : 430EX II, YN-560 II x 3 | Tripod: Manfrotto 055XProB / 498RC2 Ballhead
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    Quote Originally Posted by ArmySoldier777 View Post
    Gotcha, that explains the perspective differences on the background then lol. The bokeh on on the 24-70 definitely looks better too, with more blades.
    But then f/2.8-f/4 seems to be the spot where the 50/1.8 does the pentagon thing at portrait focus distances. At different aperture settings, the OOF highlights would look round. Bokeh can change with aperture setting, background distance and subject distance. So, pronouncing on a lens's bokeh from a single sample shot may not be giving the whole picture.

    You can also see that focal length does indeed affect DoF.

    And the point of comparing a four-figure priced L zoom against a $100 consumer prime at different focal lengths with different lighting was...?
    Last edited by inkista; 03-07-2012 at 01:42 AM.
    I shoot with a Canon 5DmkII, 50D, and S90, and Pansonic G3. flickr stream and equipment list

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    ChrisAdval's Avatar
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    Quote Originally Posted by inkista View Post
    And the point of comparing a four-figure priced L zoom against a $100 consumer prime at different focal lengths with different lighting was...?
    it was just a test of how much more sharper the 24-70 would have over the 50, personally mostly so thought I would share it with everyone. And to show the differences of a $100 lens over a 4 figure lens could show the huge difference to some who may be looking for that as well cheap vs. expensive debate on equipment like expensive profoto vs. cheap impact lighting would be an interesting test to see the differences.
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    Canon; 24-70 2.8L, 50 1.4, Tamron 70-200 2.8, 6D, 550D/T2i, 20D, and XSi.

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    I think one has to keep in mind two factors which are impressed on people again and again when reading lens reviews:

    1) The extra money for L lenses are primarily for long lasting build quality and CONSISTENCY. If an L lens goes from f/2.8 to f/5 then those two apertures and all the ones in between will be consistently excellent. As I understand it, L's have ONLY sweet spots and are therefore worth the enormous prices, or not as you may so feel.

    2) Lenses like the 50mm f/1.8 give you excellent performance FOR THE MONEY. Pay attention to the price/performance ratio on those cheaper lenses in order to find the best values. As for paying 10 times the price for an L, is the quality increase noticeable enough for most of us to justify it? Will you only really see the difference when printing billboards? I would estimate that for 75 percent of enthusiasts the non-L versions of lenses will do just fine and they will never know the difference.
    I shoot Canon and carry Kata/Manfrotto exclusively.
    Canon 6D... EF 135mm f/2L, EF 100mm f/2.8L MACRO, MP-E 65mm MACRO, EF 85mm f/1.8, Sigma 50mm f/1.4 Sigmalux, Sigma 35mm f/1.4 DG, EF 200mm F/2.8L, Lensbaby Composer Pro 50mm/Edge 80/Fisheye, Samyang 85mm & 35mm f/1.4 MF
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    Quote Originally Posted by ChrisAdval View Post
    the focal length on the 24-70mm was shot in 24mm (with crop sensor difference field of view change to 50mm), but in the 50mm was shot in 50mm, on a crop sensor thats about 70-75mm field of view, what I should have done was shot the 24-70mm at 70, as mentioned it was a quick and dirty test when I got the lens today
    The crop factor is 1.6. At 24mm the effective fov will be 38.4mm, not 50.
    50mm will give an effective fov of 80mm.
    What you should have done was used equal focal lengths at the very least. Since the 50 is a prime, change the 24-70 to 50mm.

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    Quote Originally Posted by RLucas View Post
    The crop factor is 1.6. At 24mm the effective fov will be 38.4mm, not 50.
    50mm will give an effective fov of 80mm.
    What you should have done was used equal focal lengths at the very least. Since the 50 is a prime, change the 24-70 to 50mm.
    This and as inkista mentioned, the lighting is not constant. The amount of contrast is different in (what I assume to be) the focus point of the image, so you can't really do a 1:1 comparison between the two.

    I do believe that when shot wide open the 24-70 is sharper at f/2.8 than the 50 is at f/1.8, but when stopped down to f/2.8 the sharpness between the two is quite comparable.

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    Quote Originally Posted by ceremus View Post
    This and as inkista mentioned, the lighting is not constant. The amount of contrast is different in (what I assume to be) the focus point of the image, so you can't really do a 1:1 comparison between the two.

    I do believe that when shot wide open the 24-70 is sharper at f/2.8 than the 50 is at f/1.8, but when stopped down to f/2.8 the sharpness between the two is quite comparable.
    the link is tested on a 1D MkIII which may show very different results than a crop sensor 550D

    Quote Originally Posted by RLucas View Post
    The crop factor is 1.6. At 24mm the effective fov will be 38.4mm, not 50.
    50mm will give an effective fov of 80mm.
    What you should have done was used equal focal lengths at the very least. Since the 50 is a prime, change the 24-70 to 50mm.

    my mistake I didn't do any calculations as it was a dirty and quicky test I thought I would share.
    Website | Facebook Fanpage | Facebook | Twitter | Flickr | Model Mayhem

    Canon; 24-70 2.8L, 50 1.4, Tamron 70-200 2.8, 6D, 550D/T2i, 20D, and XSi.

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