Comparing cameras

On the top left is a photo taken with my trusty old (also much used and abused) Canon 5D Mark III. On the top right is one taken by a borrowed new Sony a7Riii. Below both are cropped close-ups of detail. The scene is in a room illuminated by incandescent track lighting. It is not an art shot, though it does contain photo art by our good friend Marian Crostic, whose Sony a7R she is kindly remanding to my custody tomorrow. (Her main camera is now an a7Riii like the borrowed one I used here.)

Both photos were shot with Canon and Sony’s best 24-105 f4 zoom lenses, at the 105mm end. Both were also set to automatic, meaning the camera chooses all the settings. In both cases the camera chose ISO 3200 at f4. The only difference was shutter speed: 1/125 sec on the Canon and 1/160 sec on the Sony. While 3200 is not the prettiest ISO, I wanted to compare both cameras indoors under less than ideal lighting, because that’s typical of situations where I shoot a lot of people.

One difference between these cameras is the pixel density of the sensor: the Canon’s shot is 5760 x 3840 pixels, while the Sony’s is 7952 x 5304. While that difference accounts for some of the higher detail in the Sony’s shot, it’s clear to me that the Sony lens is simply sharper, as Ken Rockwell kinda promised in this glowing review. (Also, to be fair, the Canon lens has had a lot of use.)

All the images above are screen shots of RAW versions of the photos (.CR2 for the Canon and .ARW for the Sony). Though I don’t have the time or patience to show differences in the .JPG versions of these photos, it’s clear to me that the Canon’s JPGs look less artifacted by compression. The obvious artifacts in the Sony shots have me thinking I may only shoot RAW with the a7R, though I’ll need to test it out first.

The main difference overall, at least in this setting, is in the warmth of the color. There the Canon has a huge advantage. I could say it’s also because the Sony is slightly less exposed (by the higher shutter speed); but I noticed the same difference in test shots I took outdoors as well, under both overcast and sunlit skies, and at ISO 100. The Canon seems warmer, though the Sony has far more detail one can pull out of shadows.

I should add that neither camera got the color of the wall (a creamy white) right in these photos, with the Canon leaning hot and the Sony leaning cool.

Anyway, I just thought I’d share that much before I pick up the a7R, and start using it to shoot stuff in New York, where I’m headed Wednesday night after more than a year away.



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