Celestron Ultima Edge Eyepiece - 1.25" 18mm

Precision Engineered Optics: 18mm parfocal Ultra Flat Field eyepiece, specifically designed for 1.25” focusers, delivering uniformly crisp views across the field.
Exceptional Image Clarity: Offers incredibly sharp views from the center to the edges of the field of view.
High-Quality Light Transmission: Features a fully multi-coated, 8-element lens design, ensuring excellent brightness and clarity.
Expansive Viewing Angle: Wide 65° apparent field of view, ideal for a comprehensive astronomical observation experience.
Comfortable Observation: Generous 20mm eye relief with a fold-down rubber eyeguard, accommodating both eyeglass wearers and non-eyeglass wearers.
Durable and Ergonomic Design: Machined from high-grade aluminum with a black anodized surface for durability and a molded rubber grip ring for secure handling.
Universal Filter Compatibility: Internally threaded 1.25" barrel allows for the attachment of standard filters and accessories.
Versatile Compatibility: Suitable for use with 1.25” star diagonals and focusers.
Parfocal Advantage: Enables seamless switching between Ultima Edge eyepieces without the need to refocus.
Note on Parfocality: The 24mm model is not parfocal. Parfocality is maintained only within the Ultima Edge line and does not extend to eyepieces from other brands or series.

Specifications

GENERAL
Barrel Size Diameter:	1.25" (31.75mm)
Focal Length:	18mm (.71")
Field Stop Diameter:	23.4mm (.93")
Apparent Field of View:	65°
Optical Design:	Proprietary
Number of Lens Elements:	8
Number of Lens Groups:	5
Optical Coatings:	Fully Multi-Coated
Eye Relief:	20mm (.78")
Parfocal:	Yes
Filter Threads:	1.25" (M28.5X0.6)
Eye Guard:	Yes- roll up
Body Material:	Aluminum
Weight:	7.4 oz (209.7 g)
Dimensions:	81mm x 51mm x 51mm (3.19" x 2" x 2")
Solar Warning
California Residents	WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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