What do the numbers mean in the binoculars title? In a binocular name, the first number indicates the magnification power and the second number is the diameter of the objective lens in mm. For example, for a...
Introduction This electronic digital eyepiece has a standard fitting interface with eyepiece adapter (i.e., Diameter=1.25" or 31.75mm, fitting height=17mm) that can be fitted to a spotting scope or telescope...