Rigel 1.25" 8-24mm Zoom Eyepiece.

Fully multicoated optics, a flip down rubber eyeguard, and is threaded for filters. The zoom ranges from 8mm to 24mm and it is parfocal throughout the zoom range. Such zoom use 7 lens-elements in four groups. At least 6 surfaces are in contact with the air. This is a true "all-in-one" accessory.

• Focal length: 8-24mm and
  

• 8-24mm 45~60degrees AFOV with 18-25mm eye relief (parfocal)