Celestron 11

Celestron is made in Irvine, California, US. One could easily test a Celestron mirror because the primary is spherical, and it's accuracy is usually 1/10 waves or better. The corrective optics corrects for the spherical aberrations. This particular telescope has a composite body so it adapts to night temperatures so rapidly. Schmidt Cassegrain design is really easy to maintain because it's a sealed design. The Newtonian telescopes occasionally would need cleaning, ans all telescopes do but not Celestron. The front corrective glass has to be cleaned, and fine fabric is harmless to glass but mirror cleaning is very difficult, usually resulting in scratches. This is a  far more portable telescope than C14, which including its tripod weighs around 100 pounds.