Upon to research I found that gamma ray radiation has proven to be intensified by converging light from the primary mirror of most reflecting telescopes. The study further shows that glass, especially ED type, has the ability to absorb this gamma ray radiation. In side-by-side testing of a ED doublet refractor, a Schmidt-Cassegrain and a Newtonian reflector telescopes, the amount of radiation passed to the viewing eye is three times the normal compared to just naked eye viewing of the sky with the Newtonian. The corrector plate of the SCT showed that it stopped 25% of the incoming gamma rays before the three fold increase caused by the primary mirror so that the overall increase was lower then a Newtonian, this increase of gamma ray radiation was still over the safe limits set by the FDA. The amount of gamma ray radiation measured at exit pupil of the ED refractor was actually 3.5% less then compared to naked eye viewing. The effects of the increase gamma ray radiation were reduced when EPs of multiple elements were used. The study concluded that Astronomers using reflecting telescopes should use EPs with lots of glass, as well as Paracorrs and Barlows to absorb as much radiation as possible before it gets to your eye. The safest and healthiest way to view the sky is through a refractor or binoculars!

Dude!