9mm Nagler T1, 10.5mm Pentax XL, and 10mm Radian. So which premium eyepiece is REALLY best? [User Review]  | 05/29/02 | by Tom Trusock I recently had a chance to get 10mm Radian on loan from Allister St. Claire as part of his outreach program. I have to admit, I was really curious about ho. . . Stellarvue 102 EDT and Tele Vue 85 [Shootout]  | 05/17/02 | by Craig Carver The difference between the two was especially apparent to me during daytime terrestrial viewing. Having used the apo for a couple of years as a spotting sc. . . "Proximity index" or "magnitude-compensated separation" of double stars [Article]  | 05/11/02 | by Inge Skauvik The first double stars were discovered in the 17'th century. In the beginning nobody seemed to reflect whether the presence of close pairs was a matter of . . .