How to Calculate Length of Terrestrial Telescope?
Length of Terrestrial Telescope calculator uses Length of Terrestrial Telescope = Focal Length of Objective+4*Focal Length of Erecting lens+(Least Distance of Distinct Vision*Focal Length of Eyepiece)/(Least Distance of Distinct Vision+Focal Length of Eyepiece) to calculate the Length of Terrestrial Telescope, Length of Terrestrial Telescope formula is defined as the total length of a terrestrial telescope, which is the sum of the focal length of the objective lens, four times the focal length of the eyepiece lens, and the ratio of the diameter of the eyepiece lens to the sum of the diameter and focal length of the eyepiece lens. Length of Terrestrial Telescope is denoted by Ltt symbol.
How to calculate Length of Terrestrial Telescope using this online calculator? To use this online calculator for Length of Terrestrial Telescope, enter Focal Length of Objective (fo), Focal Length of Erecting lens (f), Least Distance of Distinct Vision (D) & Focal Length of Eyepiece (fe) and hit the calculate button. Here is how the Length of Terrestrial Telescope calculation can be explained with given input values -> 12544.83 = 1+4*0.055+(0.25*0.04)/(0.25+0.04).