Tele-vue NP127is Manuel d'utilisateur télécharger pdf (Page 1)

32 Elkay Dr., Chester, New York 10918 (845) 469-4551. televue.com

Tele Vue

Visionary

660mm f/5.2 IMAGING SYSTEM

4-ELEMENT APO REFRACTOR

Thank you for purchasing the Tele Vue-NP127is. It has been our pleasure to craft this ﬁne instrument for you.

Nearly thirty years ago, Al Nagler received a U.S. patent for a fast, refracting telescope design based on

Josef Petzval’s portrait camera lens concept. Petzval’s design uses widely spaced doublets to produce a

ﬂat focal plane over a relatively narrow ﬁeld of view, just the sort of ﬁeld a fast telescope can see. Nagler’s

combination of ﬂat-ﬁeld, fast focal ratio, and unobstructed system lent itself perfectly for testing eyepieces.

The 5” f/4 MPT (Multi-Purpose Telescope) with its fast speed and wide, ﬂat ﬁeld, led to a series of

continuous improvements, primarily in color correction. The “Halley Commemorative,” 4” f/5.5 started

the parade where more advanced glasses including special dispersion, ﬂuorite and ﬂuorite substitute

glasses brought steady improvements. The 4” f/5 Genesis employed ﬂuorite in the rear doublet, and the

subsequent SDF and Tele Vue-101 versions at f/5.4 brought us even closer to perfection. Maintaining

this fast f/5.4 speed while reducing tube length in a totally new design with new glasses allowed virtually

ideal color correction and improved ﬁeld ﬂatness in this, the ideal form culminating the 20 year reﬁnement

toward perfection with the Nagler-Petzval 101, and NP127 with an even faster f/5.2 speed.

The Tele Vue-NP127is reﬁnes the original NP127 with the addition of a more robust, larger focuser

now standard with 10:1 reduction. The “is” designation denotes Imaging System, Tele Vue telescopes

with speciﬁc mechanical advantages for photography. Tele Vue offers a series of accessories in conjunc-

tion with each optical system so you are assured of compatibility and maximum performance. While the

NP127is maintains all the visual prowess of the previous NP127, the larger rear elements and larger

focuser along with a host of proprietary Imaging System accessories, make it ideally suited for the CCD

imager.

WARNING: NEVER try to look at the sun or point the telescope toward or near the sun without

professional solar observing equipment rigidly secured in front of the objective lens. When

observing the sun with the proper ﬁlters,

remove any sighting devices such as Star-

beam from the telescope. Use only the Tele Vue Sol

Searcher to ﬁnd the sun. Instant and permanent eye

damage may result from viewing the sun directly, even

during a solar eclipse, or when viewing through thin

clouds, or when the sun is near the horizon.

Standard Features - Optical tube assembly includes:

captive sliding dew shield, 2.4” focuser with Focus-

mate 10:1 reduction, tilt adjustment end ring, screw-

on metal lens cover, 2” Accessory Adapter, Imaging

System Adapter, custom hard-shell case, Allen Keys

for end ring tilt adjustment.

Tele Vue

2” Accessory Adapter (left)

Imaging System Adapter (right)

Lens Cap

Optical Tube Assembly

Case

Operating Guide

1 2 3 4 5 6 7 8 9 10

Résumé du contenu

Page 1 - Tele Vue

132 Elkay Dr., Chester, New York 10918 (845) 469-4551. televue.comTele Vue®Visionary660mm f/5.2 IMAGING SYSTEM4-ELEMENT APO REFRACTORThank you for

Page 2 - 1.2 Focuser

Tele Vue recommends choosing low and medium power eyepieces in ratios of ﬁeld stop diameters. For example, factors of 1.4 or 2.0. When choosing higher

Page 3 - 3.1 Eyepieces

21.0 Getting Acquainted with the Tele Vue-NP127is1.1 Optical tube assemblyThe NP optical design contains four elements consisting of two widely spaced

Page 4 - 3.2 Finders

3Imaging System Adapter or brass clamp ring within the 2” Accessory Adapter. The threaded holes on top of the focuser body accept the Digital Indic

Page 5

43.2 FindersWe particularly recommend using the Starbeam reﬂex sight (part# SFT-2003), which attaches to the Tube Rings. The case has a cutout for t

Page 6 - – 48mm Filter adapter

5LCL-1069 Large Field Corrector • Optimizesedgeofeldperformance.Recommendedfor35mmCCDs(43mmdiagonal)andlarger.NPR-1073 – 0.8x Reducer f

Page 7 - 4.2 Prime Focus

6STL-1071 – SBIG STL series camera adapter• ThisadapterissizedtothreaddirectlyontotheSTLseriescamerasandmateswithImagingSystemaccess

Page 8 - 6.0 Caring for your NP127is

74.1 Adjustable Position End RingThe tilt of the End Ring to the optical axis can be changed to compensate for any tilt errors you may see in your pho

Page 9

85.0 Imaging System Focus Accessories5.1 All Tele Vue telescopes with rack and pinion focusers now permit the photographer to index focus position to

Page 10

97.0 WarrantyTele Vue telescopes are warranted to be free of manufacturing or workmanship defects for 5 (ﬁve) years from the date of purchase, to the

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