Optec 3600 to Optec 4300 Dovetail Expansion Ring Adapter
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.
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