TeleVue NP101is APO Refractor Imaging System

Item #TVU016-1

  • List Price:
  • $5,580.00
  • Your Price:
  • $4,195.00
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  • $1,385.00 USD25% + FREE Shipping
  • Incredibly fast refractor telescope with wide field of view
  • Revolutionary draw tube design allows for quick-change from visual to imaging operation
  • Extra large rear lens minimizes vignetting
  • f/5.4 focal ratio and 540mm focal length
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  • Description

    TeleVue NP101is APO Refractor Imaging System


    Concept: CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I knew our APO objectives were up to the Tele Vue challenge, and with the proper tweaks would be extraordinary tools for the imager. With Tele Vue Imaging System ("is") telescopes, we have refined our instruments and optional equipment beyond anything a CCD chip has seen. We started small (literally) in 2005 with the Tele Vue-60is and available Digital Micrometer Kit. Achieving critical acclaim with the 60is, we were encouraged to further develop "is" telescopes and accessories to maximize aperture, real field coverage and performance, and to make the processes easier for the imager. - Al Nagler


    For 25 years, Tele Vue has pushed the boundaries of APO refractors, as well as eyepieces, to the recognized pinnacle of performance. We were gratified but not surprised that Backyard Astronomer's Guide said of the NP101: "optics don't get any better than this." No wonder Sky and Telescope rated the NP101 tops (May & June 2002) and selected it as the test instrument for its landmark review of the SBIG STL11000 CCD camera (July 2004). The "is" versions of the Tele Vue- 60, 102i, NP101 and NP127 retain the exemplary wide field and planetary visual capability while adding new features to make imaging easier and more flexible.


    We were determined to make the NP series optically, mechanically, and functionally as perfect as possible for imaging up to 50mm diagonal chips without penalty to its near ideal visual operation. How? By applying the developments created for the Tele Vue-60is to the new NP101is and NP127is and then going beyond.


    The NP101 (540mm, f/5.4, 4") and NP127 (660mm, f/5.2, 5") maintain their optical specifications yet with redesigned 4-element optical systems. Larger rear lens groups absolutely minimize vignetting in formats up to 50mm diagonal. For these large chips an optional field corrector was developed (Reviewer Note) so the corners of the newly brightened edges would virtually be as perfect as the center of the field.


    In order to take full advantage of the larger lenses, a non-vignetting focuser was developed to prevent any restriction of the larger converging light cone. The draw tube has a 3" front aperture and 2.4" rear aperture. This new draw tube also permits quick change from visual to imaging operation and allows full camera rotation without focus change. In addition, it has the capability to correct for any residual focal plane tilt and accepts a "position stop" for our digital micrometer to allow repeatable focus measurement to 0.0001".


    To maintain squareness to the optical axis while changing camera orientation, the draw tube has four lock screws that tighten against a taper on the "imaging insert" ring. This insert is threaded to accept Tele Vue's new Imaging System accessories including large diameter extension tubes, optical accessories, and camera and CCD attachments, all with mating threads.

    Supplier SKU

    NPI-4057

    Shipping Restrictions

    Only ships in contiguous USA.

  • Dimensions & Specifications

    Aperture

    101mm

    Brand

    TeleVue

    Focal Length

    540mm

    Focal Ratio

    f/5.4

    GoTo

    No

    GPS

    No

    Objective Lens Size Code

    101

    Optical Design

    Refractor

    Recommended Usage

    Viewing Nebulae
    Viewing the Moon
    Viewing the Planets
    Viewing Galaxies/Star Clusters

    Telescopes Series

    Tele Vue NP101is APO Refractor Telescope

    User Level

    For the Expert

    Weight Complete

    10 lbs.

  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    Default manufacturer warranty.

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

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