Sky-Watcher Emerald 22mm 82° 2" Eyepiece

Product Overview

The Sky-Watcher Emerald 22mm 82° 2-inch Eyepiece is an ultra-wide, low-power visual astronomy eyepiece designed for sweeping, immersive views. It offers an 82° apparent field of view, a 7-element optical design, long 22mm eye relief, filter threading, all-metal construction, and an included carry case.

Who Is This Product Best For?

This eyepiece is best for visual observers who want a wider true field for large deep-sky objects, star fields, open clusters, nebulae, and relaxed low-power observing. It is a strong choice for Dobsonian, refractor, SCT, and other telescope owners with 2-inch eyepiece compatibility.

Why Choose This Product?

• Ultra-wide 82° apparent field: Provides a panoramic, immersive view for visual astronomy.
• 22mm focal length: Excellent for low-power scanning and larger celestial objects.
• Comfortable 22mm eye relief: Easier viewing during longer observing sessions.
• 2-inch barrel: Designed for telescopes, focusers, and diagonals that support 2-inch eyepieces.
• Threaded for filters: Supports compatible visual filters for lunar, nebula, and contrast-enhancement use.

Recommended Uses

• Wide-field visual observing.
• Open clusters, nebulae, large star fields, and bright galaxies.
• Low-power sweeping with Dobsonians and refractors.
• Manual telescope users who want a wider field and easier object tracking.
• Comfort-focused observing with longer eye relief.

Compatibility and Accessory Notes

The 22mm Emerald uses a 2-inch barrel and is threaded for compatible filters. It should be used with telescopes, focusers, and diagonals that accept 2-inch eyepieces. Final magnification and true field of view depend on the telescope focal length.

Important Limitations

• Requires 2-inch compatibility: This eyepiece is not suitable for telescopes limited to 1.25-inch accessories.
• Low-power use: Choose a shorter focal length such as the 9mm Emerald for higher magnification.
• Visual use only: This is an eyepiece for observing, not a camera adapter or imaging accessory.

Frequently Asked Questions

Is this eyepiece good for beginners?

Yes, if the telescope accepts 2-inch eyepieces. It is a good upgrade for beginners and intermediate observers who want wider, more comfortable low-power views.

What is it best used for?

It is best for large objects, wide-field scanning, open clusters, nebulae, and relaxed low-power observing.

Will it fit my telescope?

It fits telescopes that accept standard 2-inch eyepieces.

Can I use filters with it?

Yes. The eyepiece is threaded for compatible filters.

When should I choose another focal length?

Choose the 16mm for mid-power viewing or the 9mm for higher magnification on the Moon, planets, and compact targets.

Our Recommendation

Ontario Telescope recommends the Sky-Watcher Emerald 22mm 82° eyepiece for observers who want a wide, comfortable, low-power eyepiece for visual astronomy. It is especially useful for sweeping star fields, viewing larger objects, and making manual tracking feel easier thanks to its wide apparent field.