Criterion had been manufacturing "Custom Dynascope" models from 6" through 16" diameter since the 1950's. These were excellent quality telescopes. Two less expensive models however were very popular and quite a few are still available today.
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The RV 6 was 6" f/8 telescope with a 1 ¼" focuser and eyepieces, a moderate 1" shaft equatorial mount and clock drive. It also had a hinged cradle on mount to allow rotation of the tube. The RV 8 was introduced in 1971 as an 8" f/7 telescope with the same 1 ¼" focuser and eyepieces, equatorial mount and clock drive. The RV 8 was dropped and then reintroduced in 1981 after a nearly 8 year interruption in manufacturing, this time with f/8 optical system and manual declination control as standard. | |
| RV 6 |