Antares 2X Twist-Lock Barlow Lens - 1.25" - UB2TL type-barlows-and-focal-extenders This is an unnecessary system

This is an unnecessary system or adjustment to include with William Optics diagonals

Optimized for APS-C sized sensors

Celestron Product Number: 11074-XLT

(No photo of the blue product was available

Antares 2X Twist-Lock Barlow Lens - 1.25" - UB2TL type-barlows-and-focal-extenders This is an unnecessary systemAntares Barlow Lens 1. 25" 2x Twist Lock Product Highlights: Antares Barlow Lens 1. 25" 2x 2x Increase of Nominal Focal Length 27 mm Aperture Doublet Includes Twist Lock Collar for Eyepieces Accepts 1. 25" Accessories Includes T2 Threads (Twist Lock Removed) Fully Multicoated Antares Twist lock barlows make it easy to insert and remove your existing eyepiece and work with any barrel format. These extend focal length, reduce spherical aberration,