[Allan_L (Allan)]

Originally Posted by overlord

http://upload.wikimedia.org/wikipedi...-Telescope.svg

http://en.wikipedia.org/wiki/Reflecting_telescope

This is to avoid the ladder. Instead another mirror can simply be attached. Obsession telescopes use mirrors of I think 98% reflectivity + so there is no need any longer to use the antiquated Newtonian design.

Its just like a big SCT isn't it ?
Without the corrector plate.