After shooting Canon DSLRs for over 20 years and investing a lot in Canon lenses, I decided to try the a7r III after reading reviews that said it now had one of the best focus systems available and Sony was making very good lenses.

That may be the 42 mp sensor but the excellent lenses also contribute.

The good Sony lenses cost twice as much as the good lenses from other brands, and they don't come without their own issues

Through a multi-decade partnership Sony and German manufacturer Zeiss have created some truly excellent lenses, many of which are on par with, or surperior to, the Sony G Master line

With all lenses, but especially fast prime lenses, this gives me far better keeper rate than Canon

I shoot a lot with fast lenses and so focus is very important

Many companies are now jumping on board with this camera and you can find some great lenses for decent prices or you can go all out with the G-Master line

When paired with the right lenses, it is a relatively compact system.

The FE lenses (especially the G lenses) are AWESOME and there is now quite a wide selection available

Any of the Sony lenses with the GM stamp are of the highest quality on the market; they are also their most expensive lenses

Expect that lenses and accessories will be noticably more expensive that the same items from Canon, from a battery grip, to telephoto extnenders, to lenses.

While many dSLR lenses are stabilized these days, many ultrawide and prime lenses remain non-stabilized.

I passed on Sony in the past because its focus systems were way too slow and the lenses were mediocre.

While I now have native Sony Lenses you can use other lenses from your collection just remember you will need adapters that may not work as well as the native lenses

While I now have native Sony Lenses you can use other lenses from your collection just remember you will need adapters that may not work as well as the native lenses

My only gripe is with the available lenses

IBIS technology is another huge advantage of Sony - you can pick super old (and cheap) lenses from ebay and they will be stabilized once you put them on Sony!l