>>3123015Here is where
>>3120672. It has all of the formulae to make telescopes of all flavors, and is easy to understand. There are tons of telescope material suppliers as well. A 6 inch f/8 or better is an easy way to start since they are spherical mirrors, anything below f/8 starts requiring correction to get good results. Refractor objectives are not even beginner lenses, especially if you go with two, or more. Then you are dealing with 6 sides to work with, and then there is spacing as well. The worst part of the whole thing is the testing, and building the test equipment.
Like I said in my first post I would not want to make a camera lens. Mainly because I am so anal, and would go with more than 3 elements for the best optics I could get.
