Optec-3600 Expansion Adapter to OPTEC-4300 Standard Dovetail

This Optec 17870 Expansion collar allows the use of any OPTEC-3600 male dovetail mount to fit the Gemini or TCF-S3 Low Profile focusers.

The Optec 3600 Expansion to 4300 Standard Dovetail Adapter is made of high quality aluminum and black anodized.