Truss Dobsonian Telescope Plans

Truss Dobsonian Telescope

At the distance of the primary mirror wat I put the diagonal in a Newtonian telescope.?

Tell me about the focal length. I'm trying to make a truss tube Dobsonian design. The diameter of the mirror is 6 ", this is my second after a scope of 5" closed tube EQ. Can plss u give me the formula or sumthing. I kno there is no focal School Project, ABT U answered a question of black film, which means ur an Indian, where they can u get good information astronomical these days in India. I need help with things myscope n. Are u from space? or ru Vayada of galelio Nilesh

Since the distance focal failed to mention that it is impossible to measure the distance between the primary mirror and diagonal. I calculated that there must be more than a meter when the rate of f is high enough. I do not need be Indian to see Indian films. DVDs are released throughout the world. However, I am neither in space or Galileo. I run an astronomy organization myself. Am associated with many other international organizations.