|
TeleVue - NP-127is Imaging System
TeleVue 10% OFF Telescope Sale!!
|
$ 6285.00
$ 6985.00
Reg.$ 8700.00
SAVE $ 1715.00
SAVE $ 2415.00 | |
Click here for recommended accessories |
TeleVue 10% OFF Telescope Sale!! |
|
CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I
knew our APO objectives were up to the 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.
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 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.
Focuser Features
A. Large Focuser for NP127is Standard features (A) include:
* Drawtube with 3” entrance aperture, 2.4” exit aperture
* End-ring with tilt capability
* 4-Lock knobs to secure camera equipment or 2” adapter
* Body has brass clamp ring with 2 lock knobs
* Focusmate 6:1 dual speed focuser
* Indexed 2” accessory adapter
* Imaging insert threaded for imaging system components.
|
