Gentlemen; can anyone tell me how ORION's 80mm. "EXPRESS" differs from the CELESTRON 80 ED refractor? thank you, John M
ORION 80mm EXPRESS
Started by Midnight Sun, 08/02/2009 03:43PM
Posted 08/02/2009 03:43PM
Opening Post
Posted 08/02/2009 07:34PM
| Edited 08/02/2009 07:35PM
#1
John Meiners said:
Gentlemen; can anyone tell me how ORION's 80mm. "EXPRESS" differs from the CELESTRON 80 ED refractor? thank you, John M
The Orion Express 80 was made by a different factory and was sold as a "semi-Apo" but I believe was, in fact a achromat. There were several other similar scopes, the Antares Sentinel comes to mind.
The Celestron 80 ED is made by the Synta Factory and uses the high end ED glass FPL-53 in it's doublet and as the "True Apo" thread documents, provides very good color correction as the
True Apo thread demonstrates. The equivalent Orion scope is the ED-80. The differences are the diameter of the tube, 100mm for the Orion, 90mm for the Celestron, and the focuser, a Crayford for the Orion, a rack and pinion for the Celestron.
Jon
Funding Member
