[Solves Focusing Problems] The extension tube features m48 female and male threads to eliminate spacing issues in astrophotography and enhance image clarity by reducing stray light.
[Easy to Use] With a design focused on eliminating reflections and enhancing image quality, this extension tube kit is essential for capturing stunning photographs with your telescope.
[Versatile Usage] Compatible with astronomic telescopes, this kit includes extension tubes of different heights to meet your specific photography needs and achieve optimal results.
[Variable Length Options] Achieve spacing by combining various extension rings of 3mm to 30mm with the option to use 1 to 8 rings as needed for customization.
[ Construction] Made of anodized aluminum, this all-metal extension tube ensures long-lasting performance and provides the correct image scale required by reducers or field flatteners.

Spec:

Item Type: Length Extension Tube Kit
Material: Aluminum Alloy
Gross Weight: 107g / 3.8oz
Extension Tube Height: Approx.3mm / 0.1in, Approx.5mm / 0.2in, Approx.7mm / 0.3in, Approx.10mm / 0.4in, Approx.12mm / 0.5in, Approx.15mm / 0.6in, Approx.20mm / 0.8in, Approx.30mm / 1.2in
Thread: M48X0.75
Use: for Astronomical Telescope Photography

Package List:
8 x Extending Ring