Hi All,
I have been reading and researching for some time, thank you for sharing a fantastic resource of knowledge on this website.
I am considering as my first scope - an 8" or 10" Dob, quoted as having a paraboloidal mirror. I understand from my school days what a parabolic shape is and what it does for optical reflections, but google only explains mathematically what a defines a paraboloid.
I understand the problem of a spherical mirror, can you explain why this shape is utilised, or is it just marketing ploy.
What is its useful application (max diameter)
All advice greatly appreciated
Dale