DeafStar

Hi, I am making an experiment with a good quality round 360/900 (f/2.5) Fresnel lens just for fun. I think it will work quite well under low magnification (5-20x range) for nebulas since nebulas are almost edgeless feature so I don't care too much about seeing any rings from the Fresnel lens if any and I doubt will see any especially at night time. I don't mind to make my own eyepiece if I have to to correct any coma or aberration. I am trying to stick with the basic for now. Any thoughts to share would be grateful. Todd