Skip to content
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece
Sky-Watcher Emerald 22mm 82° Eyepiece

Sky-Watcher Emerald 22mm 82° Eyepiece

by Sky-Watcher
SKU SW-S51000
Sold out
$310.00 - $310.00
$310.00
$310.00 - $310.00
$310.00
Price Match Policy!
  • 22mm Focal Length with an 82° Apparent Field of View
  • 2" Barrel, Threaded for Filters
  • 7-Element, Fully Multi-Coated Optical Design
  • 18mm Eye Relief
  • Precision-Machined All-Metal Construction
  • Travel Case with Strap Included
Out of stock
Qualifies for FREE Shipping in CONUS on orders over $350.
Visual Simulator Preview
Visual Simulator Instant FOV Preview

Preview your eyepiece's FOV

Simulate the exact field of view of the Sky-Watcher Emerald 22mm 82° Eyepiece with your specific telescope.

Launch Visual Assistant
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Sky-Watcher Emerald 22mm 82° Eyepiece

    The Sky-Watcher Emerald 22mm 82° Eyepiece is a low-to-medium-power wide-field eyepiece for star fields, open clusters and extended nebulae. Its 82° apparent field of view is more than 50% wider than the roughly 50° field of a standard Plössl, so targets sit inside a broad, immersive view and stay in the eyepiece longer on a non-tracking telescope. The 7-element, fully multi-coated optical design is housed in a precision-machined all-metal body with a 2" barrel, and the eyepiece ships with a protective travel case with strap.

    82° Field: 1.5° of Sky at 55x in a 1200mm Telescope

    In a telescope with a 1200mm focal length, such as an 8-inch f/6 Dobsonian, the Emerald 22mm delivers 55x. Dividing the 82° apparent field by that magnification gives a true field of about 1.5°. That is about three full Moons side by side, wide enough for large open clusters and bright nebulae.

    18mm of Eye Relief in a 2" Eyepiece

    The 18mm of eye relief gives room for a relaxed viewing position and is generally enough for observers who keep their eyeglasses on. At 1.3 lbs (0.59 kg) and 4.75" x 2.375" (length x width), it is a substantial 2" eyepiece, so plan to rebalance a Dobsonian or a light mount when switching from small 1.25" eyepieces.

    7 Fully Multi-Coated Elements in an All-Metal Housing

    Sky-Watcher positions the Emerald series as premium 82° eyepieces for amateur astronomers who want top-tier performance without the top-tier price tag. The 7-element optical design is fully multi-coated to maximize light transmission and contrast, and the precision-machined metal housing is built to withstand years of use in the field.

    • Threaded for Filters: The 2" barrel is threaded for filters, so light pollution, nebula and color filters can stay on the eyepiece.
    • Included Travel Case: The case with strap measures 6" x 4" x 3.25" and protects the eyepiece from bumps, dust and moisture on the way to a dark site.

  • Can I use the Emerald 22mm in a 1.25" focuser?

    No. The Emerald 22mm has a 2" barrel, so it requires a 2" focuser or a 2" star diagonal. Telescopes limited to 1.25" eyepieces should use the Emerald 9mm, which has a 1.25" barrel.

    What magnification will the Emerald 22mm give me?

    Divide your telescope's focal length by 22. In a 1200mm Dobsonian it gives 55x, in a 700mm refractor such as the Evostar EDX 100 it gives 32x, and in a 2700mm Maksutov such as the Skymax 180 it gives 123x.

    Can I use it while wearing eyeglasses?

    The 18mm of eye relief gives room for a relaxed viewing position and is generally enough for observers who keep their eyeglasses on.

    Does it accept filters?

    Yes. Sky-Watcher specifies the barrel as threaded for filters, so you can attach filters sized for its 2" barrel.

    How does the Emerald 22mm compare with the other Emerald eyepieces?

    All three Emerald eyepieces share the 82° field, 7-element design and all-metal build. The 9mm has a 1.25" barrel and 8mm of eye relief, the 16mm has a 2" barrel and 14mm of eye relief, and the 22mm has a 2" barrel and 18mm of eye relief.

  • UPC 810098970938
    Optical Specifications
    Focal Length 22mm
    Apparent Field of View 82°
    Optical Elements 7
    Lens Coatings Fully multi-coated
    Eye Relief 18mm
    Mechanical Specifications
    Barrel Size 2"
    Threaded for Filters Yes
    Construction All-metal
    Dimensions (Length x Width) 4.75" x 2.375"
    Weight 1.3 lbs (0.59 kg)
    Shipping Information
    Included Case Yes, with strap
    Case Dimensions 6" x 4" x 3.25"
    Shipping Weight 1.5 lbs (0.68 kg)
    Shipping Dimensions 7" x 4.75" x 4.5"
    Product Information
    SKU S51000

    • Emerald 22mm 82° Eyepiece

      × 1

    • Travel Case with Strap

      × 1

  • Sky-Watcher 2-Year Limited Warranty