Eyepiece Zoom Sky-Watcher 7-21mm (31,75)

The Sky-Watcher Zoom 7-21mm Eyepiece is a versatile eyepiece that allows you to cover all focal lengths from 7mm to 21mm in one single eyepiece. This makes it ideal for astronomers and terrestrial observers who want to travel light and not be burdened with their entire range of traditional eyepieces.

It is particularly well-suited to small portable binoculars, such as the 80/400 which it converts into a true terrestrial long-range viewer. The Zoom Eyepiece has a smooth 1.25" (31.75mm) fit, its focal length varies by rotating one part of the eyepiece on itself.

Characteristics

• Barrel: 31.75mm
• Apparent field: 30° (at 21mm) - 43° (at 7mm)
• Weight: 164g
• External diameter: 40mm
• Eye relief: 17 (at 21mm) - 19mm (at 7mm)

All lenses are multi-coated. Good grip thanks to a rubberized ribbing. Anti- parasite light hood included. Like most eyepieces, it is compatible with 31.75mm filters due to the presence of threading.