1. Focus problem elimination: The expansion tube has M48 female wire and M48 male wire, which is used to solve the distance problem in astrophotography and eliminate a series of focus problem. Eliminate Redundant light: The design of female wire can eliminate stray light and reflected light, making the image clearer and more perfect. Variable combination: the required distance can be achieved by combining several expansion rings of different lengths, you can use 1, 2, 3 or 8 expansion rings if necessary.
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, , using this extension tube can obtain the correct image scale or the precise spacing required by the reducer or field flattener.
Spec:
Item Type: Length Extension Tube Kit
Material: Aluminum Alloy
Gross Weight: 107g / 3.8oz
Extension Tube Height:Approx.3mm / 0.1in, About 5mm / 0.2in, about 7mm / 0.3in, about 10mm / 0.4in, about 12mm / 0.5in, about 15mm / 0.6in, about.20mm / 0.8in, ca.30mm / 1.2in
thread: m48x0.75
USICUS: for astronomical telescope photography
Package List:
8 x Executive ring br/> /