I sure I state the obvious that you need to be sure that the example you are buying is the Nikon mount version??? Buy I surmise, bearing in mind what little I know of Nikon is that they have body varients that may not be 100% compatible with all Nikon mount lenses.......hopefully those in the know will chime in?I have the chance to buy a
Sigma 135-400mm f/4.5-5.6 d apo lens for my Nikon D5300. Would I get full auto ficus with this lens please?
Looks like you are rightNo autofocus on a D5300 as it lacks the in body autofocus motor needed for the older screw drive lenses. (far as I can tell it's a screw drive AF lens)
If you can get a picture of the lens mount, that'll confirm it. There would be what would look like a flat head screw in the lower right corner of the mount.