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Lunt Solar Systems 1.25" 7.2mm-21.5mm Zoom Eyepiece # LS7-21ZE

  • Telescope zoom eyepiece with continuously variable 7.2mm to 21.5mm focal length range
  • Provides a variety of viewing magnifications in a single eyepiece
  • Designed for Lunt H-alpha solar telescopes, and can be used for terrestrial and night viewing with non-solar telescopes
  • Provides a 40-degree field of view at 21.5mm, and a wider 60-degree field of view at 7.2mm
  • 15mm eye relief for comfortable viewing
  • Fully multi-coated 7-element optics for clear and crisp images
  • Threaded for use with 1.25" filters when used with non-solar telescopes

The Lunt Zoom Eyepiece # LS7-21ZE offers ideal magnifications
for the standard focal lengths of Lunt H-alpha solar telescopes. It's an
ideal 'first look' eyepiece that allows you to quickly view the Sun at a
lower magnification, then zoom to higher magnification to see
interesting details.

The focal length of this 1.25" eyepiece ranges from 7.2 mm to 21.5 mm
with graded markings at focal lengths of 7.2mm, 10mm, 13.5mm, and
21.5mm. The power change ring on the eyepiece features a ribbed gripping
surface that makes it easy to make small power changes between these
ranges, even when wearing gloves.

The optics in the eyepiece consists of 7 multi-coated lens elements
in 4 groups for clear, crisp images. The apparent field of view ranges
from 40 degrees at 21.5mm to 60 degrees at 7.2mm. Eye relief is a
comfortable 15mm and the barrel is threaded for standard 1.25" filters
when the eyepiece is used for general non-solar observing.

While designed for solar observing with a Lunt solar telescope, this
eyepiece can also be used for general terrestrial or night-time
observing with a non-solar telescope. (Note: For safe solar observation,
this eyepiece MUST be used with a solar telescope equipped with safe
solar filters).

The Lunt Zoom Eyepiece is great little eyepiece at an affordable price.

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