I've been looking at mirrorless cameras for some time with a view to replacing my Canon 5DMk3. The camera I am considering is a Sony A7R III, and will be used as an all-rounder, but mostly for family portraits & landscape. Initially I will continue to make use of my Canon L series lenses with an adapter, until such time that I can afford the Sony lenses. Is the Sony a better camera? My main drivers for the change is a better camera and weight savings. Is this a good move or not?
Years ago when I had a 5D I bought into MFT for a number of reasons and one (well, two) were saving bulk and weight and the first time I took my Pany G1 out instead of the 5D I honestly had to keep checking the bag to make sure it was still in there such was the weight saving. IMO if you want to save weight and bulk the smaller systems make the most sense and the RF style cameras even more so. These days I have RF style Pany GX80 and GX9 and compact and light lenses and this kit offers image quality which quite easily beats the old 5D and goes to ISO's that were science fiction back then. I don't now how MFT compares to a 5DIII though.
I also have a Sony A7 and the image quality comfortably beats MFT if I go pixel peeping looking for the differences. I have the excellent and tiny 35mm f2.8, the slightly larger but sill small and excellent 55mm f1.8 and the larger and yet again excellent 85mm f1.8 and I have a couple of native Voigtlander manual lenses too, 35mm f1.4 and 40mm f1.2.
I think that the A7 series makes the most sense over a DSLR in two areas...
- If you want compact and light kit, like a camera body and something like the 35mm f2.8 and/or 55mm f1.8.
- If you see and want the other advantages mirrorless may offer over DSLR's such as peaking, magnified view, in view histogram, WYSIWYG, no MA faff on etc.
PS.
My A7 doesn't have eye detect, just face and TBH it's quite a revelation when taking shots of people as you don't have to move the focus point and can concentrate on the subject, framing and capturing the moment. It's great for natural unposed shots and I can only imagine that eye detect is even better. The people shooting portraits and weddings certainly seem to be saying it's wonderful and it's one thing that is tempting me towards an A7III.