Re: How Does Side Focus Work Exactly?
Yeah, no locking ring but I've never found the need for one. I like them without.
Anyway, the quick setup I use--set the sidefocus to infinity, put it on 18X pointing at the sky (or white wall or something letting your eye focus like it's the sky) focus the crosshair with the ocular focus ring using quick glances trying to get it in the middle of the range where it's sharp.
Then you're done with that unless your eyesight changes (happens more often than some think) or you want to do some fine tuning. Now the target at various ranges should come into focus the same time parallax is eliminated for that distance. Always check by wiggling your eye though, that scope as a very large depth of field so it's really easy to bring things into focus (not nearly as "touchy" as some other scopes).
Also note it's not going to do much on the lower powers, so if you're turning it around on 3X and it's not doing anything...that's OK. ;)