Eyepiece Pentax XW 3,5mm 1,25"

Eyepiece Pentax XW 3,5mm 1,25"

Eyepieces Pentax Eyepieces
high performance wide angle for use with high quality spotting scopes.

XW Series

• Clear, comfortable viewing assured by a 70° apparent viewing angle and 20mm eye relief.
  All PENTAX XW smc series eyepieces feature an extra-wide 70-degree apparent viewing angle and extra-long 20mm eye relief to deliver an exciting, wide-perspective image.
• High-grade optics for exceptional image quality.
  The high-performance optics of the XW series incorporate ultra-low dispersion, high-refractive lanthanum glass elements to produce a well-balanced image with minimal aberrations .It is specially designed to reduce the annoying blackout effect by effectively compensating for spherical aberration of the pupil.
• PENTAX original multilayer coating for excellent light transmission efficiency.
  All lens surfaces that come in contact with air are treated with the original multilayer coating, while all laminated surfaces are treated with the innovative partial coating to provide a light transmission efficiency of over 90% (an astounding 96% at 550 nm) over the visible light spectrum.
• Advanced light-shielding technology for enhanced image contrast.
  Thanks to PENTAX's advanced computer simulation technology, the XW series features a light-shielding diaphragm in the most effective position to dramatically reduce internal reflections for a brighter, higher-contrast image.
• A choice of four magnifications to meet specific applications.
  With four different magnifications (7mm, 10mm, 14mm and 20mm) to choose from, the XW series suits a wide range of both casual and specialized applications.
• Weatherproof construction for all-weather viewing.
  The XW Series features JIS Class 4* weatherproof construction, allowing for use in drizzle or under night dew.
  * XW Series eyepieces are not designed for underwater use and should not be submerged under water.
• The XW3.5 and XW5 models are designed exclusively for astronomical observations.
  The XW series features a wide apparent angle of view (70 degrees), JIS Class 4 weatherproof construction, and a long eye relief (20 mm) .The optics, incorporating low-dispersion, high-refractive lanthanum glass elements and a PENTAX-original multi-coating, deliver bright, high-resolution images with minimal aberrations and distortions.

Specifications:

Capacity
Apparent field of view (°)	70
Focal length (mm)	3,5
Eye relief (mm)	20
Number of lenses	8
Number of groups	5
Connection (to telescope)	1,25"
Connector (at camera end)	M43
Optical system coating	multiple
Transmission	96 (550 nm)
Field stop (mm)	4,3
Special features
Adjustable eyecup	yes (rotatable)
Optional camera adapter	yes
Filter thread	yes
inert gas charge	no
General
Type	Eyepiece
type of construction	SWA
Series	XW
Weight (grams)	405
Length (mm)	137
Diameter (mm)	61