The #17653 1/2-inch extension spacer mounts directly on to the OPTEC-2400 male dovetail and presents the OPTEC-2400 male dovetail for attachment of any device with an OPTEC-2400 receiver. This extension should be used a bit more back-focus is required.
- Outside Diameter: 2.97" (75.4mm)
- Overall Height: 0.82" (20.8mm)
- Clear Aperture: 2.15" (54.6mm)
- Weight: 2.4 oz (70 g)
- Back-focus Addition: 0.5" (12.7mm)