On Glass Optic Spacer

The Optic Spacer is the part that fits the On Glass adapter to your particular optic. It snaps into the Adapter Ring without tools and holds the eyepiece in the right position for the phone to line up.

Buy one on its own to use a kit you already own on a second scope or pair of binoculars. Made in the USA.

• Alpha: eyepiece 39.4 to 41.7 mm (1.55 to 1.64 in)
• Bravo: 41.9 to 44.2 mm (1.65 to 1.74 in)
• Charlie: 44.5 to 46.7 mm (1.75 to 1.84 in)
• Delta: 47.0 to 49.3 mm (1.85 to 1.94 in)
• Echo: 49.5 to 51.8 mm (1.95 to 2.04 in)
• Foxtrot: 52.1 to 54.4 mm (2.05 to 2.14 in)
• Gulf: 54.6 to 56.9 mm (2.15 to 2.24 in)
• Hotel: 57.2 to 59.4 mm (2.25 to 2.34 in)

Measure the outside diameter of your eyepiece to find your size, or ask us and we will check it for you.