Optec Inc. 2-inch to 3-inch Thread Adapter: Precision Integration for Cameras and Focusers

• Camera and Filter Wheel Adaptation: Designed to adapt Apogee and SBIG cameras and filter wheels for use with the TCF-S focuser.
• Precision Machining: Holds tight tolerances of +/- 0.003 inches for a superior slip-fit, ensuring secure and stable attachment.
• Enhanced Focuser Compatibility: Features a precision-machined dovetail that matches the thumbscrews on the TCF-S focuser's drawtube, eliminating flexure.
• Durable and Reliable: Crafted with high-quality materials for long-lasting use in demanding astronomical environments.
• Compatibility Caution: Specifically notes that FLI cameras and filter wheels with a 3-inch x 24tpi thread require careful fitting due to slightly larger dimensions.
• FLI Filter Wheel Consideration: Advises checking for sufficient thread clearance (0.100 inches) when connecting to FLI filter wheels to avoid obstructing the filter carousel.
• Essential for Advanced Astrophotography: A crucial accessory for astronomers and astrophotographers seeking precise camera and focuser integration.

Specifications

Camera-side Compatibility:

• TCF-S or TCF-Si focuser,
• TCF-S3 or TCF-S3i focuser with #17804 3-inch to 2-inch reducer,
• Any manufacturer's 2-inch focuser or receiver.

• Overall Outside Diameter: 3.2" (81mm)
• Outside Diameter (drawtube body): 1.995" (50.7mm)
• Overall Height: 2.32" (59mm)
• Height of 3x24 threads: 0.22" (5.6mm)
• Clear Aperture: 1.80" (45.7mm)
• Weight: 3.0 oz (85 g)
• Back-focus Usage: 0.10" (2.75 mm)

Mechanical Drawing