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Product Feature: Connect all those DSLR camera T-rings (with M42x0.75mm thread) to telescopes. Buil..

New M52 to M42 Focusing Helicoid Ring 17-31mm 25-55mm 36 - 90mm Macro Extension Tube w/ Copper Core ..

New M58 Focusing Helicoid Ring 25mm to 55mm Camera tube Ajustable w/ Cooper Core  Product Feat..

New M58 to M58 Focusing Helicoid Ring 36 - 90mm Macro Extension Tube  Product Feature: This t..

New M65 Macro Extension Tube Focusing Helicoid Ring 25 - 55mm W/ Copper core Product Feature This ..

New M65 to M65 Focusing Helicoid Ring 17- 31mm Macro Extension Tube Product Feature: This tube use..

New 7mm S mount MTV Lens Extension tube Adapter Ring for M12X0.5 Board Lens 7mm and 10mm   ..

New Telescope Finder Guider Tube Rings with dovetail mounting plate Dia.60mm   Telescope guid..