Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to compare rifle scopes [title] Identify what you are looking at. When looking at two different scopes you must first manage to identify them. [step] Most rifle scopes have a marking composed of two or more numbers, separated by an x. the first is the magnification of the scope, and the second is the diameter of the objective (in millimeters).

Ending1: The firing distance of the telescopes means that the magnification measurement is greater than the target ranges. In comparison, the magnification is great for scopes that have small, round images. Ending2: [substeps] The multimeter that comes with an objective varies by scope. As with chemical scopes, the multimeter must be calibrated according to the manual (a measuring tape, pen, or small yardstick will work). Ending3: You are looking at a fixed-point aperture. The aperture requires that you either align your gaze up, down, left or right, without moving your gaze. Ending4: [substeps] For example a 4x28 scope has 4x magnification and and objective lens of 28 mm in diameter. Some scopes have a varying magnification, or zoom.

Answer format: ending1/ending2/ending3/ending4