As we finished describing basic parameters and mechanical properties of the Viper HD 20- 60×85 let's move to the best part - the practical performance of its optics. The Pentax PF 80ED-A spotting scope was chosen for comparison's sake. It is equipped with three eyepieces: the 30 mm P...
of the settings of the vortex tube pressure, that determines the vortex strength, and the wind tunnel speed, that determines the freestream condition, at which each dataset was obtained; they are arranged to display the different conditions together and allow their direct comparison and analysis. ...