Orion Pro Lanthanum Zoom Eyepiece

Being parfocal means the eyepiece maintains focus as you zoom in or out. You won't need to adjust your telescope's focus knob every time you change the magnification level, which makes scanning the night sky much smoother.

This eyepiece uses a standard 1.25-inch barrel, which is the most common size for modern telescopes. As long as your telescope focuser accepts 1.25-inch accessories, it will be compatible.

With 20mm of eye relief, this eyepiece is designed for comfort, especially if you wear eyeglasses while observing. You can see the full field of view without pressing your eye directly against the glass.

Yes, the barrel is threaded to accept standard 1.25-inch filters. This allows you to easily screw in moon, planetary, or light-pollution filters to enhance your viewing experience.

The apparent field of view ranges from 40 degrees at the 24mm setting to 60 degrees at the 8mm setting. This means you get a wider, more immersive view when you are zoomed in for higher magnification.

Absolutely. Because it offers a variable zoom range and high-contrast optics, it works well for terrestrial targets. It allows you to quickly adjust your magnification to frame distant objects without swapping out eyepieces.