The basic representation of telescopes is as follows: Magnification × Objective Lens Diameter (in millimeters). The specification representation of different types of telescopes only has minor differences, but all follow this pattern. The details are explained below:
1.1. The Representation of Fixed-Magnification Binoculars (the Most Common Type of binoculars)
Magnification × Objective Lens Diameter (in millimeters). For example, 7x50 indicates that the binoculars has a magnification of 7 times and an objective lens diameter of 50 millimeters; 10×25 indicates that the binoculars has a magnification of 10 times and an objective lens diameter of 25 millimeters.
1.2. The Representation of Zoom binoculars in JAXY
Zoom binoculars are represented by "Lowest Magnification - Highest Magnification × Objective Lens Diameter (in millimeters)." For example, 8-25x25 indicates that the telescope has a lowest magnification of 8 times, a highest magnification of 25 times, and can continuously zoom between 8 times and 25 times, with an objective lens diameter of 25 millimeters.
1.3. The Representation of Fixed-Zoom Telescopes
Fixed-zoom binoculars are represented by Low Magnification / High Magnification ( / Higher Magnification) × Objective Lens Diameter (in millimeters). For example, 15/30×80 indicates a telescope with fixed magnifications of 15 times and 30 times, and an objective lens diameter of 80 millimeters.