A lot of people shy away from “vintage” or even new manual focus lenses inspite of the fact that there exists a huge variety of such high quality lenses, some that can be had for a song.
The device featured in the below linked video may be something of an enticement to take the plunge though a little pricey depending on outlook.
The reality is if factoring in the cost of this device and and two or three vintage lenses it becomes very cost effective and competitive if a person insists on auto focus.
I neither own nor have tested this auto focus device but the concept seems workable and basically mimics a slide rail such as those used for macro.
I’m comfortable with manual focus and have a few lenses that are – I suspect there will be a number of companies coming out with something similar now and it will become a matter of construction, quality, and price.
This has nothing to do with above photo, just wanted to take the opportunity to share the info.