102mm, f/8.6, APO (Doublet) Refractor. With the Tele Vue-102 we offer the amateur a simpler, less expensive, 4" refractor which retains Tele Vue's core values: outstanding optical performance and superb mechanical quality.

The Tele Vue-102 is a 4-inch, 2-element f/8.6 APO air-spaced doublet, similar to the appearance to the 4-element f/5.4 Tele Vue-101, but 5-inches longer. The Tele Vue-102 achieves similar diffraction limited, high power APO viewing as its 4" sibling, along with a wide 3 degree maximum visual field (compared to 4.9 degrees for the Tele Vue-101). A dedicated 0.8x reducer/flattener is available to permit great astrophotography of star fields at f/6.9 with the Tele Vue-102.

Specifications
TV – 102 Type APO (Doublet) Refractor
(Elements/Groups: 2/1)
Objective (mm) 102
Focal Length (mm) 880
Focal Ratio (f/#) 8.6
Drawtube/Focuser 2-inch, rack/pinion
Length OTA (inch) 30.9
Length with diagonal (inch) 33.8 (with 2-inch diagonal)
Weight OTA/Std. Config (lbs) 8.8 / 11.1 (14.8 Brass)
Maximum Visual Field (deg.) 3 (with 2-inch 55mm Plössl)
Maximum Recommended Power (x) 250