The folks at Engineerable sent me the Lens Shifter to review. (Full disclosure: I did not pay for the review unit)
The lens shifter is similar to the Focus Shifter (reviewed here: https://youtu.be/-b9StKMphu4), but it’s geared for photography use instead of video.
The lens shifter consists of an integrated handle and ribbed belt that you can use on lenses with diameters from 58mm to 98mm.
The lens shifter is designed to make manual focusing, and/or zooming easier and more precise. Check out the video for the full review