The Explorer II Zoom eyepiece lets you change magnification power without physically changing eyepieces.
A twist of the zoom eyepiece housing changes focal length from 7mm to 21mm, providing a variety of viewing magnification powers.
Eyepiece consists of four elements which are fully coated with anti-reflection coatings for clear, contrasty views.
Exceptionally long 16mm-to-33mm eye relief range allows eyeglass wearers to enjoy the entire view while still wearing their corrective lenses without vignetting.
The 1.25" barrel is threaded for use with like-sized eyepiece filters.
Alstar 1.25" 25mm 58-Degree Planetary Eyepiece for Telescope
KWD 25
Alstar 2" 2.5X Barlow Lens - Allows The Use of Both 2" and 1.25" Eyepieces
KWD 35.500
Alstar Alignment 1.25" Next Generation Laser Collimator for Newtonian Telescopes
KWD 10
Alstar 1.25" 5mm 58-Degree Planetary Eyepiece for Telescope
KWD 21
