Just like the a7 III price drop of last week, the Sigma Black Friday promotion starts now. Sony shooters can save up to $250 on Sigma Art lenses and $100 off the MC-11 converter. I’ve been converting my legacy Canon glass with the MC-11 since it was launched 3 years ago. Any lens mount converter is a bit slower than a native mount, but all the features of your Sony body will work.
The Sigma Black Friday promotion runs from now until through December 5, 2019. Take advantage of the promotion directly from Sigma, a dealer near you, Adorama or B&H. Of the three lenses on sale, I recommend the 35 F1.4.
That’s my most-used lens. Attach that to the a7 III and you’re shooting mirrorless for under $3K.