A zoom cell has a main zoom cell body having a central axis, at least two fingers extending from the main zoom cell body parallel to the central axis, and at least two grooves separating the at least two fingers. A zoom cell system has at least two zoom cells disposed in an erector tube, with the fingers of the at least two zoom cells pointed towards one another, with the at least two zoom cells positioned such that the fingers of a first of the at least two zoom cells align so as to correspond with at least one of the at least two grooves of the other of the at least two zoom cells.