
Originally Posted by
TummieGaruda
If there is an error they can't go out and fix it like they did with Hubble. Speaking of which, wasn't Hubble's issue that they decided to skip testing the mirror's curvature to save time and money and it ended up being misaligned by the width of a hair screwing up the focal length? I've ran into this before when trying to build my own telescope where I didn't grind the glass enough and when I did a Foucoult test my focal length was way off. I wanted an 8 inch F/6 but end up with an 8 inch F/24.