Octpeak M48*0.75 Mount Adapter Telescope Eyepiece Lens for AI Camera,M48 Adapter, Telescope Eyepiece Adapter - Walmart.com
General Brand MC/MD Lens to Telescope Adapter BT833 B&H Photo
Amazon.com : Microscope Adapter 0.5× C Mount Lens Adapter Set 23.2mm/30mm /30.5mm Ports for CCD Camera and Digital Eyepiece : Electronics
TAK Eyepiece Adapter (31.7mm) | Takahashi America
0.5X Reduction Lens / Relay Lens Camera Coupler C-Mount Adapter, to Convert 25mm to Microscope Eyepiece Diameter 23.2mm 30mm 30.5mm | Boli Optics Microscope Store
Tele Vue low profile adapter to use 1.25" eyepieces in 2" focusers | Astronomics.com
Antares 2" to 1.25" Twist-Lock Eyepiece Adapter
Macro Lens Adapter for Nikon F Lens Mount to 1.25in Eyepiece Telescope Eyepieces | eBay