1. Eliminate Focusing Problems The extension tube adopts M48 female thread and M48 male thread, solving the distance problem in astrophotography and eliminating a number of focusing problems.
2. Eliminate Excess Light The design of the internal thread can eliminate stray light and reflected light, making the image clearer and perfect.
3. Variable Combination The desired distance can be achieved by combining multiple extension rings of different lengths, you can use 1, 2, 3 or 8 extension rings according to your needs.
4. Type: astronomical telescope M48 thread extension tube, the height of the extension tube is 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm and 30mm.
5. Aluminum alloy material: all-metal structure and anodized aluminum process, durable. With this extension tube, you can achieve the correct image scale or the exact distance required by the reducer or image field debner.
Specification:
Item Type:Focal Length Extension Tube Kit
Material: aluminium alloy.
Gross weight: 107 g / 3.8 ounces.
Height of extension tube: approx. 3 mm / 0.1 inches, approx. 5 mm / 0.2 inches, approx. 0.7 mm / 0.3 inches, approx. 10 mm / 0.4 inches, approx. 12 mm / 0.5 inches, approx. 15 mm / 0.6 inches, approx. 20 mm / 0.8 inches, approx. 30 mm / 1.2 inches.
Thread: M48 x 0.75.
Use: for astronomical telescope photography.
Packing list:
8 x extension rings.