Lightdow 420-800mm f/8.3-16 Manual Telephoto Zoom Lens for Canon RF Canon EF Nikon F Nikon Z Sony A Sony E Mount Camera

I bought this to use with my Sony A5100, and it does work—but it doesn’t read the F-stop value at all in any mode. Adjusting the manual dial is quite difficult; it’s really hard to turn. It takes forever to get the focus right. Even when using a tripod, the image still shakes quite a bit. If you’re thinking of using this to photograph birds or anything like that, I wouldn’t recommend giving it a try—it’d just be a waste of money.