For 30 years, Tele Vue has pushed the boundaries of APO refractors, as well as eyepieces, to the recognized pinnacle of performance. The Imaging System (is) version of the Tele Vue NP127 retain the exemplary wide field and planetary visual capability while adding new features to make imaging easier and more flexible.
Tele Vue was determined to make the NP series optically, mechanically, and functionally as perfect as possible for imaging up to 50mm diagonal chips without penalty to its near ideal visual operation. The NP127is maintains its optical specifications with redesigned 4-element optical systems. Larger rear lens groups absolutely minimize vignetting in formats up to 50mm diagonal. For these large chips an optional field corrector was developed so the corners of the newly brightened edges would virtually be as perfect as the center of the field.
To take full advantage of the larger lenses, Tele Vue developed a larger focuser and draw tube having a 3" front aperture and 2.4" rear aperture. This eliminates any restriction of the larger diameter converging light cone. The rack and pinion focuser is designed to hold 12 lbs. of weight, yet still permit extremely fine focusing control via a 10:1 dual speed pinion assembly. This new draw tube also permits quick change from visual to imaging operation and allows full camera rotation without focus change.
Type: APO (Nagler-Petzval) Refractor
Focal Length: 660mm
Focal Ratio: f/5.2
Drawtube/Focuser: 2.4-inch, Focusmate dual-speed rack/pinion
Length OTA: 33.5 inches
Length with diagonal: 36.5 inches (2-inch diagonal)
Weight: 15.4 lbs (OTA), 18.3 lbs (Standard config)
Maximum Visual Field: 4 degrees with 2-inch 55mm Plossl
Maximum Recommended Power: 300x
Tele Vue Eyepiece Performance: View Eyepiece Chart
Enlarged focuser with 3" entrance aperture and 2.4" exit aperture
Focuser body has brass clamp ring with 2-lock knobs
Accessory end-ring with tilt capability and 4-lock knobs
Imaging insert threaded for Imaging System components
2" accessory insert for visual or other 2" accessories
Focusmate dual-speed focuser 10:1
Sliding metal dew shield
Screw-on metal lens cover
Hard-shell carry case