i have a question:
some years ago, in 2015 i bought a new GSO parabolic primary mirror 6" F4
I thought to have time/will to build my telescope, but i did not have this time,
so the mirror is still packed and never used.
Now i would like to give it a try, building a telescope without having to buy expensive parts specific for astronomy use, but only normal stuff.
I can buy a plastic or metal tube in the near diy stores , and can 3d print the parts to build a focuser, this should not be a problem.
But the other main part that is missing, is the secondary mirror.
I searched on online stores, and i found that an elliptical plane secondary mirror , with dimension that fits with my primary mirror diameter and focal lenght, costs about $100.
This is too much to give a try to my old (new) mirror.
So i wonder if i could use a 'normal' (that is a small mirror for bath, personal use etc) new good plane mirror.
I own a glass cutter, so i think i can cut it in the dimension and shape that i need.
What do you think?
Is it possible?
If not, why?
Let me know, thank you!