I see many proud astrophotographers using an EdgeHD+Hyperstar configuration.
Since an EdgeHD costs significantly more than a traditional (non-Edge) SCT, I am asking the following question. When used with Hyperstar, does the EdgeHD offer any significant benefit over a non-Edge SCT? By "significant" I mean more than bragging rights and some incremental improvement due to more careful or up-to-date manufacturing execution.
If I understand it correctly, the Edge scopes still have f/2 spherical mirrors and the Schmidt corrector that goes with it. These are the only components that matter when used with a Hyperstar.
That mirror can have a better coating, be polished to higher precision or ride on a smoother focusing mechanism but these are what I consider better manufacturing. The corrector/flattener optics in the draw tube that distinguishes the EdgeHD is not in play when Hyperstar is used.
Please explain me what I am missing here!
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
Quote:When used with Hyperstar, does the EdgeHD offer any significant benefit over a non-Edge SCT?
Quote:Maybe, maybe not, and the Hyperstar is collimateable and will likely have to be collimated no matter which scope you use it on.
Quote:After aligning the corrector and the secondary holder to the primary, and getting rid of all the play on the Hyperstar unit itself, I am no more using any of the collimation screws.