Objective Lens and Main Tube
When buying a rifle scope, two of the most important factors that you should consider are the objective lens and main tube of the scope. Usually, the ideal measurement for the main tube of a rifle scope is 30 mm or 34 mm in diameter. However, the size would still depend on your usage. If you are looking for a scope that can increase the adjustment range, then it is advisable to go for a large diameter main tube. This is perfect for long distance targeting.
The size of your objective lens should also be taken into consideration. Ideally, everything from 20 mm to 72mm is always available in the market. Again, just like when choosing the size of the main tube, choosing the size of your objective lens would also depend on your preference and requirement. Ideally, objective lens with a larger size is used in order to boost an optic’s light-gathering ability. This is perfect for low light conditions.
Apart from the main tube and objective lens, it is also important to pay attention to the glass of the scope. When choosing glass, some experts would recommend to always go for brands that are reliable and established already. As a rule of thumb, you always get what you pay for. Thus, if you want a glass with amazing specs and feats. Always go for a quality one. In addition, it is also important to make sure that the lenses are multi-coated for light transmission and maximum brightness.
Lastly, it is also crucial to pay attention to the magnification as it will determine the accuracy of your scope. Proper magnification is always subjective. So in this case, always consider your reference and requirement if you’re still confused how to select a rifle scope.