Nikon NAV SW 17.5mm eyepiece

NIKON NAV SW Series Astronomical Eyepieces

Hot off their optical benches, Nikon commemorated the International Year of Astronomy 2009 with the birth of their brand new and long awaited NAV-SW series eyepieces. Manufactured in five different focal lengths, all are now currently available.

Nikon NAV SWs, based on their excellent eyepieces for Nikon spotting scopes, have evolved to meet the requirements of high level astronomical observation, with the deepest attention devoted to exquisite rendition of astronomical point sources of light, while also taking a chapter for the digiscope design world, which demands flat fields and sharp images right to the very edge of the field of view. The NAV SW design emphasizes suppresion of field curvature and all astigmatism to bring about the maximum improvement in edge of field fidelity wthout sacrificing the quality of the image at the central of field.

Nikon NAV SWs have a FOV from 68° to 74° and come with a 1,25" barrel with filterthread. The comfortable eye relief specs for each eyepiece are designed to also harmonize with the optical performance of that eyepiece. Also, removal of exit pupil aberrations virtually eliminates any instance of kidney bean blackout effect, regardless of where the eye is placed during observation. The excellent color balance of the NAV SWs was derived through rigorous testing of this optical parameter on terrestrial objects, insuring the highest degree of planetary and lunar color rendition. Multicoatings on every optical surface make sure that these images are also as bright and otherwise distortion free as possible.

The Nikon NAV SW exterior design is somewhat reminiscent of the tried and true Nikkor lens design, with an attractive, high quality appearance, and rollets located around the entire circumference making the eyepieces easy and sure to grip even in darkness, or with gloved hands. A flexible silicone rubber eye shield on the top of the eyepiece helps block streets lights and other annoying sources of light pollution, especially a help when viewing sensitive planetary and lunar surface details at high magnifications. Under the eye shield you will find a M48 thread.

Nikon NAV SWs moisture resistant design will provide long years of constant and worry free service and viewing pleasure to discriminating astronomers in any observing environment worldwide.

The combination of the ideal optical qualities of a flat and wide 72° , that is sharp from edge to edge, excellent color rendition, comfortable eye relief intelligently designed to harmonzie specifically with each eyepiece, a beautiful and compact body design, highest quality Japanese glass, multi-coatings and exterior materials, and a good selection of focal lengths, makes the Nikon NAV SWs a true and new winner in the ever expanding world of 21 century astronomy.

NIKON NAV SW Serie (visuel) Eyepiece Specs
Items	f/l	Field of View	eye relief	Lens design	Diameter heigth (mm)	Weight (gr.)	Price incl. 19% VAT
NAV 5SW	5mm	74°	18mm	6 Groups / 8 Lenses	56.5 x 91	300	Euro 690
NAV 7SW	7mm	72°	17mm	6 Groups / 8 Lenses	56.5 x 78	290	Euro 690
NAV 10SW	10mm	74°	19mm	6 Groups / 8 Lenses	56.5 x 79	300	Euro 690
NAV 14SW	14mm	72°	18mm	5 Groups / 7 Lenses	56.5 x 77.5	275	Euro 690
NAV 17.5SW	17.5mm	68°	26mm	5 Groups / 8 Lenses	56.5 x 94.5	365	Euro 690
EiC-16 Barlow lens	Specifically optimized for Nikon NAV SWs, the EiC-16 provides a 1.6X tele-extension for the NAV SWs, with even more enhanced field curvature and astigamitism suppresion. Can also be used with other makers` eyepieces, 1.25" size						Euro 352