Lens Adapter Ring Extension Tube Kit,camera Tube Telescope Covers,variable Tube Microscope Lens M42 …See more

Description Feature:1.

Easy to install, perfect replacement for the old or damaged one, reliable to use.2.

Made from high quality aluminum alloy, which is wear-resistant and not easy to damage.3.

Using fine workmanship CNC technology, the accuracy is higher, durable.4.

The female thread specification of the interface is M42x0.75mm, the male threadspecification is M42x0.75mm.5.

Various sizes of 3mm/5mm/7mm/10mm/12mm/15mm/20mm/30mm are suitable for different models. How to Use:1.

Remove the objective lens.2.

Connect the telephoto tube to the eyepiece and the objective lens.3.

Then connect the objective lens. Specification: Item Type: Lens Extension Tubes Material: Aluminum Alloy Color: Black Product Size: Approx.

3mm / 0.12in, 5mm / 0.20in, 7mm / 0.28in, 10mm / 0.39in, 15mm / 0.59in, 20mm / 0.79in, 30mm / 1.18in, 12mm / 0.47in Application: Extend the length of the primary mirror of the astronomical telescopeExtinction Treatment: Internal with extinction threadInterface Female Thread Specification: M42x0.75mmInterface Male Thread Specification: M42x0.75mm