Tele Vue Optics TV-NP101is OTA:

Unmatched Performance in APO Refractors

30 Years of Excellence: Tele Vue has consistently led in developing APO refractors and eyepieces, reaching the pinnacle of performance.
Renowned Quality: Celebrated in the Backyard Astronomer's Guide for unrivaled optics, and chosen by Sky and Telescope for their significant SBIG STL11000 CCD camera review.
Advanced "is" Versions: The Tele Vue-60, NP101, and NP127 "is" versions maintain exceptional wide field and planetary visual capabilities, enhanced for easier and more flexible imaging.
Optical Perfection for Imaging: Redesigned to optimally serve up to 50mm diagonal chips without compromising visual performance.
Imaging System Scope Capabilities: Includes Focusmate Driver and Digital Indicator Kit, ideal for DSLR cameras on mounts like the Vixen Sphinx.
Redesigned Optical Systems: The NP101 (540mm, f/5.4, 4") and NP127 (660mm, f/5.2, 5") feature 4-element systems with larger rear lens groups to minimize vignetting.
Larger Focuser and Draw Tube: A new 3" front aperture and 2.4" rear aperture focuser eliminates light cone restrictions, capable of holding 12 lbs. while offering fine focusing control.
Versatile and Precise Focusing: Quick transition from visual to imaging operation with full camera rotation, plus residual focal plane tilt correction and repeatable focus measurement capability.
Innovative Imaging Insert Ring: Ensures squareness to the optical axis with three lock screws and compatibility with Tele Vue's Imaging System accessories.
Focusmate 10:1 Focuser and Accessories: Offers ultra-sensitive adjustment, measurable with an optional Digital Micrometer Kit, and electronic motor control with the Focusmate Driver.
Tele Vue's Commitment to Quality: Continues to create visual and imaging instruments that exceed expectations, backed by dedicated local machinists and in-house staff.

Specifications

Type	APO (Nagler-Petzval) Refractor (Elements/Groups: 4/2)
Objective (mm)	101
Focal Length (mm)	540
Focal Ratio (f/#)	5.4
Length OTA (inch)	25.5
Length with diagonal (inch)	28.5
Weight OTA/Std. Config (lbs)	10.7 / 10.7
Drawtube/Focuser	2.4-inch, Focusmate dual-speed rack/pinion
Maximum Visual Field (deg.)	4.9 (with 2-inch 55mm Plössl or 41mm Panoptic)
Maximum Recommended Power (x)	250

What's in the Box?

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-NP101is OTA

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