9: COG page

This is a center of gravity calculator. It is organized around 2 columns.

On the left, place (click on the add button) the weights at the bottom of the optical tube assembly. Text is “free type”. Weight is in Kg. Do the same for the top side.

“bottom/top len”, and weight(Kg)/mm allows you to enter the specs of the “tube” itself. Let us say that your tube is 50g/mm of length and that if extends 50mm bellow the mirror surface and 100 after the secondary center (the distance between the 2 being fixed at focal-secondary to focal).

The system will calculate the distance between the mirror front and the center of Gravity of your tube.