1. ELIMINATE FOCUSING PROBLEMS The extension tube has an M48 female thread and an M48 male thread, which can solve the distance problem in astrophotography and eliminate 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 more perfect.
3. Variable combination: the desired distance can be achieved by combining multiple spacer rings of different lengths, depending on your needs, you can use 1, 2, 3 or 8 spacer rings.
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, the correct image scale or the exact distance needed by the reducer or image field debner can be achieved.
Specification:
Item Type:Focal Length Extension Tube Kit
Material: aluminium alloy.
Gross weight: 107g/3.8oz
Extension tube height: 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.
Box contents:
8 x extension rings.