Tele Vue NP101 4" f/5.4 Refractor scope (Ivory tube) with 10:1 Dual Speed Pinion Assembly Focuser.
What's Included With This Item:
- custom-fitted case, screw-on lens cover, sliding dew/glare shield, 2" everbrite, 1 1/4" adapter.
The successor to the Tele Vue-101 - The NP-101 (Nagler-Petzval) is more compact with the same 4-element, 540mm, f/5.4 specifications. This scope is 4" shorter and feature both optical and mechanical enhancements over the previous model.
Ivory color powder-coated aluminum tube, black anodized lens housing, focuser assembly and mounting ring.
|Telescope type||4-element apochromat refractor using special dispersion glasses|
|Clear aperture||101mm (4 inches)|
|Aperture gain||208 (compared to a 7mm exit pupil)|
|Focal length||540mm (21.3 inches)|
|Resolution (visual)||1.1 arc-sec (Dawes limit for a 4" aperture)|
|Resolution (photo)||260 line pairs per mm|
|Field (35mm film)||2.5 degrees by 3.8 degrees (4.5 degrees diagonal)|
|Image scale||2.7 degrees per inch|
|Magnification||10x to over 250x using Tele Vue eyepieces and Barlows|
|Star diagonal||2 inch, "everbrite" mirror type, with 1-1/4" inch adapter, both with brass clamp rings.|
|Focuser||2 inch, rack and pinion type with brass clamp ring.|
|Finder||Optional Starbeam or 55mm Plossl for 10x, 4.9 degree field|
|Mounting||Adjustable mounting ring with 1/4-20 tapped holes for standard (heavy-duty) photographic tripods or optional Tele Vue mounting systems|
|Weight||10 lbs. O.T.A.|
|Length||29", 26" O.T.A.|