M54x0.75 Metal Focal Length Extension Tube Kits 4/5/6/7/8/9mm For Astronomical Telescope Photography Extending T Ring

8 PCS M48X0.75 Focal Length Extension Tube Kit 3 5 7 10 12 15 20 30mm Extending Ring for Astronomical Telescope Photography Astronomical Extension Tube Kit Variable combination-: The required spacing can be achieved by combining multiple extension rings of different lengths. You can use 1, 2, 3 or 8 extension rings as required. The required spacing can be achieved by combining s al extension rings of different lengths, you can use 1, 2, 3 or 8 extension rings as required. Our product has strict quality control standards, through improved design and advanced production technology to provide you with high quality products Spec: Item Type: Focal Length Extension Tube Kit Material: Aluminum Alloy Gross Weight: 107g / 3.8oz Extension Tube Height: Approx.3mm / 0.1in, Approx.5mm / 0.2in, Approx.7mm / 0.3in, Approx.10mm / 0.4in, Approx.12mm / 0.5in, Approx.15mm / 0.6in, Approx.20mm / 0.8in, Approx.30mm / 1.2in Thread: M48X0.75 Use: for Astronomical Telescope Photography packing list: 8 x Extending Ring Used for Astronomical Telescope Photography