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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 02 Mar 2011 (Wednesday) 04:51
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DOF aside...bokeh comparison

 
zarray
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Location: Singapore/ London
     
Mar 02, 2011 04:51 |  #1

Hi all,

recently been reading up a lot on these forums and looking at amazing pictures online.

Just curious how would a 1.6x fare against a fullframe with a given AOV and subject-to-camera distance. For example a shot with FF on 135mm F2 compared with another similar shot on a crop body with 85mm F2.

All the online DOF calculators mean nothing more than numbers to me and thus I'd like to see some actual photos instead of numbers.

In due time I will need to move to a smaller body and am trying to make a decision between the 5Dc or the 7D. Make no mistake, I'm not trying to start another 5D vs 7D war here but would like to see controlled image tests between the two. I was initially very keen on the 7D due to its AF, the wireless flash trigger and perhaps the microadjust function. But everytime I see images from the 5D's fullframe sensor I go FWAHHHHH:lol:

I've owned bodies with all three sensor formats(50D, 1d2n and 5Dc) before but not all at the same time. I never got the opportunity to do such a test. Has anyone did such a comparison on this forum or on other websites perhaps?


5D Mark II | 5Dc |17-40 | 24-105 | 70-200 F2.8 IS | Sigma 50mm 1.4 | 580EX

  
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JeffreyG
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Mar 02, 2011 05:32 |  #2

Ignoring the actual aesthetic quality of the blur region generated by the lens (the bokeh), you can get a very good feel of how much the amount of blur will be different by yourself using just a 1.6X body.

Take a picture using an 85mm lens at f/3.2. Now take a second picture at f/2.

The second picture will look the same as how the image would have come out using a FF camera at 135mm and f/3.2. So compare this second image to the first one you took at 85mm and f/3.2 and you will see the relative difference between 1.6X and FF at the same aperture.

For 1.3X, do the same thing but use apertures only 2/3 stop different instead of 1 and 1/3 stop.


My personal stuff:http://www.flickr.com/​photos/jngirbach/sets/ (external link)
I use a Canon 5DIII and a Sony A7rIII

  
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zarray
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Mar 02, 2011 10:18 |  #3

JeffreyG wrote in post #11940897 (external link)
Ignoring the actual aesthetic quality of the blur region generated by the lens (the bokeh), you can get a very good feel of how much the amount of blur will be different by yourself using just a 1.6X body.

Take a picture using an 85mm lens at f/3.2. Now take a second picture at f/2.

The second picture will look the same as how the image would have come out using a FF camera at 135mm and f/3.2. So compare this second image to the first one you took at 85mm and f/3.2 and you will see the relative difference between 1.6X and FF at the same aperture.

For 1.3X, do the same thing but use apertures only 2/3 stop different instead of 1 and 1/3 stop.

oh...just tried it. Never thought of this method before!

Thanks!


5D Mark II | 5Dc |17-40 | 24-105 | 70-200 F2.8 IS | Sigma 50mm 1.4 | 580EX

  
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DOF aside...bokeh comparison
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
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