Apertura 5 mm Spacer Extension Ring with Standard M42 T-Mount Thread

Shop extension rings such as this Apertura 5 mm Spacer with Standard 42 mm M42 T-Thread at High Point Scientific

Telescope Adapter, Extensions & Spacers Buy an Adapter for your Telescope Equipment at High Point Scientific

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Astro Essentials T / M42 Adjustment / Spacer Ring Set

Telescope Adapter, Extensions & Spacers Buy an Adapter for your Telescope Equipment at High Point Scientific

Spacer Rings / Extenders - Adapters - Parts & Accessories

Ring Adapter,Metal M42-M42 Male to Male Ring Adapter with M42x0.75mm Thread,for Filters,Easy to Installation

Adapters - Baader Planetarium - Telescope Brands

Optical Component Threading Adapters with SM1 (1.035-40) Threads

The best solution of 55mm back focal length – ZWO ASI

T2 (T-mount) M42 x 0.75mm spacer, 16mm long.

T2 M42 x 0.75mm spacer, 16mm long

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M42 Lens E Mount Macro Focusing Helicoid Tube, M42 Lens to Sony E-Mount Helicoid Adapter, allows M42 Screw Mount Lens (eg Pentax Super Takumar, Helios etc) to fit on E-mount camera body. Made with light-weight alloy This Helicoid tube offers a total of 32mm movement distance for Lens focusing. It can works as a standard M42 lens to E-Mount Adapter and allows M42 Lens Focus to Infinity.

Fotasy M42 Lens to Sony NEX E-Mount Adapter Ring/Macro Focusing Helicoid

Astromania T-Ring and M42 to 1.25 Telescope Adapter (T-Mount) for All Canon EOS SLR/DSLR Cameras : Electronics