About this product
Part Number: TVNP101is
TeleVue's NP101is Refracting Telescope has pushed the boundaries of APO refractors once again. This "is" version retains the exemplary wide field and planetary visual capability while adding new features to make imaging easier and more flexible. By applying the already well crafted features of the TeleVue 60is to the new NP101is, this refracting telescope provides excellent image quality up to 50 mm diagonal sensors without penalty to its near ideal visual operation.
The NP101is maintains its optical specifications but with a redesigned 4-element optical design. The larger rear lens groups absolutely minimise vignetting in formats up to 50mm diagonal. For these large sensors an optional field corrector was developed so the corners of the newly brightened edges would virtually be as perfect as the centre of the field.
TeleVue developed a larger draw tube and focuser having a 3" front aperture and 2.4" rear aperture. This feature helps eliminate any restriction of the larger diameter converging light cone. Also, the new draw tube permits quick change from visual to imaging operations. This allows full camera rotation without focus change. The draw tube has four lock screws that tighten against a taper on the "imaging insert" ring which help maintain squareness to the optical axis when changing camera orientation.
The Focusmate 10:1 planetary ball type reduction focuser provides extremely sensitive focus adjustment, measurable with the optional Digital Micrometer Kit to better than 1/10,000". designed by Starlight Instruments this provides extremely sensitive focus adjustment. Electronic motor control of the focusing is possible with the optional Focusmate Driver. This driver has an adjustable speed and direction push-buttons. Just one simple tap of the button permits vibration-free focusing steps as small as approximately 0.0005". The Focusmate Driver can be remotely computer controlled with the optional Focusmaster Computer Interface.
Some features of the NP101 Imaging System include dual speed knobs on the right side of the scope only, knobs with knurled rubber grip rings, new draw tube permitting quick change from visual to imaging operations and allowing full camera rotation without focus change, a large focuser and draw tube and inserted threads to accept TeleVue's new Imaging System accessories. All together this product makes for great observation with the utmost technological and creative advances.
- Type: APO (Nagler-Petzval Refractor) (Elements/Groups 4/2)
- Aperture: 101mm
- Focal Length: 540mm
- Focal Ratio: 5.4
- OTA Length: 25.5 Inches
- OTA Length with Diagonal: 28.5 inches
- Weight OTA/Std Configuration: 10.7lbs
- Drawtube/Focuser: 2.4 Inch, Focusmate Dual Speed Rack and Pinion
- Maximum Visual Field: 4.9 degrees with 2" 55mm Plossl
- Maximum Recommended Power: 250x
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