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Tele Vue NP127is Nagler-Petzval APO Refractor Telescope OTA - NPI-5054
Tele Vue NP127is Refracting Telescope OTA
- TeleVue NP127is Refracting Telescope has a new 10:1 focuser pinion assembly and a longer captive dew shield
- Both optical and mechanical designs on the NP127is have been revised to additionally shrink atmospheric defocusing ability
- Delivering smaller spot sizes over a broader wavelength, the new lens prescription is a stainless steel lens cell providing better thermal stability, and advanced multi-coatings maximize contrast and transmission
- Even with its new design and outstanding features, the NP127is keeps its predecessor's fast f/5.2 flat-field optics and the ability to image across a 52 mm diagonal sensor
- TeleVue NP127is is compatible with ALL TeleVue imaging system accessories
The NP127is Refracting Telescope is another sound, sophisticated refracting scope by TeleVue. The new lens prescription delivers smaller spot sizes over a broader wavelength range than previously before. As well, the new stainless steel front cell helps provide better thermal stability in extreme climates. The new NP127is has advanced multi-coatings that are applied to maximize transmission and contrast. Still being the fastest in the industry, there is just no competitive comparison considering its f/5.2 speed and flat-field.
NP127is has also been mechanically updated from its longer captive dew shield to its new 10:1 focuser pinion assembly which is made for Tele Vue by Starlight Instruments. Bringing a refined elegance to this high performance APO refractor, the NP127is features a new shape of the dew shield and the rear cell, while also having a new gloss black anodized metalwork treatment.
The non-vignetting focuser retains its 3" input and 2.4" output to reduce bulk and permits imaging across the largest commercially available CCD chips (52mm diagonal). No need for a heavier, more cumbersome 3" focuser. Every 2.4" focuser we make is tested to hold and drive a minimum of 6 lb of weight in vertical orientation.
The TeleVue NP127is is exceptional because of the standard to which it is built. The four element air-spaced Nagler-Petzval system begins with a precision machined 660mm focal length optical tube that is fully internally blackened to prevent any stray light inflections. Then it's combined with a 127mm aperture extra low dispersion glass doublet as the primary lens with a secondary field-flattening/aberration-correcting extra low dispersion glass doublet at the opposite end. All optical coatings on the NP127is receive index matched multi-coatings. This design offers up diffraction-limited apochromatic performance as well as correcting for field curvature, spherochromatism, secondary spectrum, coma, spherical aberration, and astigmatism.
Overall, the NP127is Refracting Telescope by TeleVue is yet another masterpiece for superb observation. Not only is the design of the NP127is sleek and catching to the eye, but its performance goes above and beyond!