The Ranger is Tele Vue's old 70 mm refractor, no
longer made. I bought it used in about 2000. The
SM40 refers to Coronado's SolarMax 40, a 40 mm
H-alpha filter with a 0.7 nm bandwidth.

"SolarMax 40" also referred to the complete 40 mm scope w/filters. I have
one. Coronado's nomenclature could be confusing.
--
Curtis Croulet
Temecula, California