Meade #128 short type 3x Barlow.

Fully multi-coated achromatic design with edge-blackened lenses for maximum contrast. The Barlow is ideal for use with low-powered (long focal length) eyepieces to deliver higher powers, but with maximum eye-relief and viewing comfort. This excellent-quality Meade Barlow achieves high-powered views with a high standard of colour correction at low cost – ideal for planetary and lunar observing.