Tele Vue Optics TV-NP127is OTA:

The Pinnacle of APO Refractor and Imaging Technology

Decades of Optical Excellence: For 30 years, Tele Vue has been at the forefront of APO refractor and eyepiece technology, achieving unparalleled performance.
High Acclaim in Astronomy: Praised by Backyard Astronomer's Guide for unmatched optics, and chosen by Sky and Telescope for testing the SBIG STL11000 CCD camera.
Innovative "is" Series: The Tele Vue-60, NP101, and NP127 "is" versions retain their superior wide field and planetary visual capabilities, now enhanced for more versatile imaging.
Optimized for Imaging and Visual Use: Designed to be perfect for imaging up to 50mm diagonal chips without compromising visual operation.
Advanced Optical Systems: The NP101 (540mm, f/5.4, 4") and NP127 (660mm, f/5.2, 5") feature redesigned 4-element systems to minimize vignetting and ensure edge-to-edge clarity.
Upgraded Focuser and Draw Tube: Newly developed larger focuser and draw tube with 3" front and 2.4" rear apertures eliminate light cone restrictions, supporting up to 12 lbs. and allowing fine focusing control.
Versatile and Precise Adjustments: Quick transition capability from visual to imaging operation, with full camera rotation and no focus change, plus focal plane tilt correction and repeatable focus measurements.
Secure and Accurate Positioning: The draw tube includes three lock screws for maintaining squareness to the optical axis, accommodating a range of Imaging System accessories.
Sensitive Focusing Mechanism: Features the Focusmate 10:1 planetary ball type reduction focuser for ultra-sensitive adjustment, with optional Digital Micrometer Kit and Focusmate Driver for electronic control.
Tele Vue's Commitment to Quality: Renowned for producing visual instruments beyond expectations, Tele Vue continues this tradition with its advanced imaging equipment, backed by dedicated craftsmanship.

Specifications

Type	APO (Nagler-Petzval) Refractor (Elements/Groups: 4/2)
Objective (mm)	127
Focal Length (mm)	660
Focal Ratio (f/#)	5.2
Length OTA (inch)	33.5
Length with diagonal (inch)	36.5 (with 2-inch diagonal)
Weight OTA/Std. Config (lbs)	14.5 / 14.5
Drawtube/Focuser	2.4-inch, Focusmate dual-speed rack/pinion
Maximum Visual Field (deg.)	4 (with 2-inch 55mm Plössl or 41mm Panoptic)
Maximum Recommended Power (x)	300

What's in the Box?

TV - NP127is & TV - NP101is

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 3-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

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Tele Vue Optics TV-NP127is OTA

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