Reply To: Purpose of side wheels?
Those big ones are primarily used by Hunter Field Target (HFT) and Field Target (FT) shooters for faster target acquisition. It’s easier to focus on different distances with a large wheel, than with a small knob. The downside of those things is, if you drop it or bump into something, your focus knob will break. Happend to me with two scopes.
Welcome to the club by the way, and good luck with your Air Arms S510, great PCP and very accurate! I used to own one with a nice walnut stock, I still regret it a little bit that I sold it, but I had to make room for a rimfire rifle.