Why should we choose the telescope with larger caliber as far as possible?

Why should we choose the telescope with larger caliber as far as possible? Sheng Sheng Photoelectric as an astronomical telescope manufacturer tells you the reason.

The 1. aperture is large and receives much more light energy, and can observe darker celestial bodies.

The 2. aperture is large, the maximum effective magnification is large, and the optical power and resolution will increase.

The 3. caliber is large and the resolution is high. More details of planets can be observed, which can distinguish binary stars, and may also find darker asteroids and comets.

Generally, the relative aperture of the refracting telescope (general medium and small astronomical telescopes) is relatively small, usually from 1/15 to 1/20, and the relative aperture of the reflecting telescope (depth space) is relatively large.