If I understand you, do you want a scope with a way to focus it? if so tha is an adjustable objective (AO) and there are a lot of scopes that can be had with this ability. The center point mentioned above is a good scope, I had one when I first got my CZ452 special. Ended up putting a Tru-Glo 6-24x44AO that cost
about the same as the center point. If you want something that will compensate for bullet drop BSA makes a series of scopes called the "sweet" series. They are for .17, .22, and .223. I know they make a 6-18 sweet .22, you can find them at Optics world. com
BTW If you are looking for "target turrets," most of the "varmint-target scopes have them, they allow you the see what your settings are for given ranges. So if you "zero" at 50 yards you can loosen the turrets and set them to zero, and when you change ranges you can dial in your new range settings. You do this by seeing what you have to change the scope to
when you shoot that range, and take notes! It makes it easier later. Also different ammo will shoot differently at the same range!
It can be a headache tring to remember all the settings. That is why notes are important!
this it the Tru Glo I got for it, it has the turrets I spoke of.