The #17655 1-inch extension spacer mounts directly on to the OPTEC-2400 male dovetail and presents the same 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: 1.3" (33.3mm)
- Clear Aperture: 2.00" (50.8mm)
- Weight: 4.6 oz (130 g)
- Back-focus Addition: 1.0" (25.4mm)