Recent content by josue2503

Can I use a shaving mirror on reflecting telescope as a primary mirror??

can i use a watch glass as a primary mirror of dobsonian telescope?

how can i get the magnification of dobsonian telescope i made??

can i use a concave aluminum mirror as an objective mirror of a dobsonian telescope??

is there anyone know how to make a parabolic mirror at home?

thanks very much so my telescope magnification is 7x and if i used an objective having 500mm focal length and an eyepiece having 10mm focal length.. my telescope magnification is 50x, right?

thanks...so..when the sun rays converges to the paper, the distance between the paper and the lens is the focal length?

how to find the focal length of my eyepiece w/ 4 lens touching each other having 500mm focal length each lens??

How to get the magnification of my telescope if my objective lens (double convex) has a focal length of 500mm, and an eyepiece w/ 4 lens (double convex) that is close together (touching each other) and has a focal length of 500mm each lens?

if the lens is 4mm in diameter how i can find the magnification and focal length?

what is the formula in finding the magnification? what is the formula in finding the magnification if i don't know the focal length?

how i can find the magnification of a lens?? how i can find the magnification of a lens if i don't know it's focal length??