I can not identify the telescope that I have other than it's a Bushnell will a 60mm lens. I don't know how to measure length but with the focus knob fully in the total length is 680mm from the very front to the diagonal. I'm looking for manual to find if I have all the parts and if it is assembled correctly. There seems to be parts missing from the finder and it has a red dot thingy that doesn't seem to work either. Help! It has a nice equatorial mount on it.