TS Optics Ultra-Series 2", 21mm, 100° eyepiece (50190)

The TS Optics Ultra-Series 2", 21mm, 100° eyepiece is crafted for astronomers who appreciate an expansive, immersive field of view and comfortable eye relief. As part of the 100° Ultra-Series, this eyepiece uses a sophisticated optical design with multiple elements and coatings, delivering sharp, high-contrast images across the entire field. Its 2" barrel ensures compatibility with a wide range of telescopes, making it especially suitable for deep-sky and wide-field observations. Additional features such as a filter thread and an adjustable, rotatable eyepiece cup enhance both versatility and comfort during extended viewing sessions.

This eyepiece is an excellent choice for those seeking a wide, immersive view with high optical quality for both deep-sky and general astronomical observations.

Optical Specifications

• Apparent field of view: 100°

• Eye relief: 16 mm

• Focal length: 21 mm

• Number of lenses: 6

• Number of groups: 4

• Optical system coating: Multiple coatings

Compatibility and Features

• Barrel size: 2"

• Filter thread: Yes

• Adjustable eyepiece cup: Yes, rotatable

General Information

• Series: 100° Ultra-Series

• Diameter: 72 mm

• Height: 121 mm

• Weight: 729 g

• Type: Eyepiece

• Build type: XWA (Extreme Wide Angle)