A few days ago, I picked up the brand new Sony A7RIII mirrorless camera. I’m not going down the usual goat path of well-worn attribute lists that most review sites cover, instead, I hope to look at features that are home runs, fails and make comparisons with other gear in such a way that other places never do. To give you an idea of what I mean, consider this upcoming comparison.

I’ve wondered how a small sensor using pixel shift would compare to a native high-resolution sensor. The cameras I will analyze will be the Olympus E-M1 MarkII in high-resolution pixel shift mode to the Sony A7RIII at its native resolution. The question I hope to answer is, how well does the pixel shift of the smaller sensor of the Olympus compare to a state of the art full frame camera? Is it a blowout, or is the Olympus the “little camera that could” challenge the big boys?

Some would argue that it’s not a fair test, that the Sony full frame will have a two stop light gathering advantage and so on. Of course, I will not be using the same lenses for the comparison, and the Olympus pixel shift depends on no movement of the subject matter while it completes the pixel shift. So it will be a bit of apple to oranges comparison, but then again, there’s no other option, and if I was making prints or sending the images to an editor for consideration, they could care less about all that. How the picture looks on the screen is what’s important, and that’s the way it should be.

So in the end, I’m going to pick top quality glass for both systems and shoot those lenses at their best aperture values. Identical field of views and histograms optimized. I will take a bit different tack when I process the files. I will apply sharpening, and I will tune each image with a few quick adjustments, and then we’ll see how it looks!

Of course, there is that little aggravation about posting to the site, web compression and so on to deal with. I’ll try to post a small relevant jpg saved at maximum quality so the comparisons will be informative, but I’m not sure yet if WordPress will apply some other funky compression and wreck the detail. Hopefully, in the next few days, I’ll load some comparisons and see how it goes.


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