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

Price: $27.59 - $29.56
(as of Apr 28, 2025 09:30:24 UTC – Details)

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 telescope
Extinction Treatment: Internal with extinction thread
Interface Female Thread Specification: M42x0.75mm
Interface Male Thread Specification: M42x0.75mm

Package List:
1 x 3mm Extension Tube
1 x 5mm Extension Tube
1 x 7mm Extension Tube
1 x 10mm Extension Tube
1 x 12mm Extension Tube
1 x 15mm Extension Tube
1 x 20mm Extension Tube
1 x 30mm Extension Tube

Note:
1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.
2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.

【Easy To Install】: perfect replacement for old or damaged, reliable use.
【Made Of High-quality Aluminum Alloy】: wear-resistant and not easy to damage
【Using Fine Workmanship Cnc Technology】: higher precision and durable.
【Thread Specification】: The internal thread specification of the interface is M42x0.75mm, and the external thread specification is M42x0.75mm.
【Various Sizes】: 3mm/5mm/7mm/10mm/12mm/15mm/20mm/30mm various sizes, suitable for different models