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FORUMS Cameras, Lenses & Accessories Canon Lenses 
Thread started 08 Oct 2013 (Tuesday) 08:19
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FF or Crop for testing Lens sharpness (300 2.8 + telecons)

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Joined Apr 2011
Oct 08, 2013 08:19 |  #1


Have many various bodies including FF and crop, high Mpix and low Mpix. I want to compare various II and III extenders and see real difference in sharpness. Which body to pickup? Which will show greater effect on sharpness. Thanks.

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Location: Edmonton AB, Canada
Oct 08, 2013 09:12 |  #2

In an absolute sense, the camera with the highest pixel density should show the biggest difference.

Right now that is typically a crop sensor. However, some crop sensors have pretty strong anti-aliasing filters that might undo some of that.

However, it won't give you sharpness info on the edge of the FOV on a full frame sensor (where there might actually be a bigger difference) so both might be useful.

Gear: 7DII | 6D | Fuji X100s |Sigma 24A, 50A, 150-600C |24-105L |Samyang 14 2.8|Tamron 90mm f2.8 |and some other stuff
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Oct 08, 2013 09:47 |  #3

I see more tcon degradation with my 50D than with my 5Dc.

Sliced Bread
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Location: Twin Cities
Oct 08, 2013 10:25 |  #4

I can't speak to the which body issue as I have only used three and not done comparisons.
Having owned both MK II and MK III extenders (both 1.4x & 2x) I can say from my experience that the 1.4Xs are close in performance, (so much that I kept one) and with the 2Xs there is a noticeable improvement on the MK III

Canon G1X II, 1D MKIV, 5DSR, 5DIV, 5D MKII, 16-35/2.8L II, 24-70/2.8L II, 70-200/2.8L IS II, IS, 100-400/4.5-5.6 L IS II, 500/4 L IS II, 24-105/4 IS, 50/2.5 macro, 1.4x MKII, 1.4X MKIII, 2X MKIII,580EX II, 550EXs(2), ST-E2.
Gitzo 1228, 1275, 1558, Lensbaby 3G. Epson 3880, Bags that match my shoes.:)

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FF or Crop for testing Lens sharpness (300 2.8 + telecons)
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