FSLMEIL Microscope Adapter Microscope Objective Lens Adapter Ring M42 to RMS, M42 to C-Mount RMS Thread/C Mount Lens to M42x0.75mm Interface Ring Adapter (Size : M42 to RMS)

FSLMEIL Microscope Adapter Ring M42 to RMS, Aluminum, M42x0.75mm to RMS (20.2mm) Interface, 1x Adapter Ring Included

SVBONY SV226 Telescope Filter Drawer, Photographic Filters Drawer with M42-M48 Adapter, Double Magnetic Filter Holder for 1.25 and 2 Inches Filter Mounted, for Deep Sky Photography

Lens Adapter Ring Extension Tube Kit,camera Tube Telescope Covers,variable Tube Microscope Lens M42 Extension Tubes Microscope Accessories 3/5/7/10/15/20/30mm Telescope Accessory For Observation