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

Our Price: $159.00
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Our Product ID: E-LS-LS7-21ZE
Manufacturer SKU: LS7-21ZE
Item Can Ship: Worldwide
Lunt Solar Systems Zoom 1.25" Eyepiece 7.2-21.5mm # LS7-21ZE

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

Quick Overview

  • 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

Product Details

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.

Please Note: Zoom eyepieces will produce a ratting sound when shaken. This is due to the clearances required for moving parts of the zoom mechanism, and does not indicate defects or loose lenses. This sound is completely normal.

Eyepiece Series Zoom
Focal Length 7.2mm-21.5mm
Barrel Size 1.25" (31.7mm)
Apparent Field of View (Mfg Specified) 53° - 40°
Eye Relief (Designed) 15mm
Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
Lens Elements 7
Lens Groups 4
Barrel Type With safety undercut
Protective Plastic Storage Container Yes - Free Agena Eyepiece Container
Protective Plastic Storage Container Size Agena 52x80mm
End Caps 2
Rubber Eye Guard Twist-up Eyecup
Weight 5.5oz