Telescope Extension Tube Set,8 Pcs M48X0.75 Length Extension Tube Kit 3 5 7 10 12 15 20 30Mm Extending For Astronomical Telescop

Feature:1. Focusing Problem Elimination: The Extension Tube Has M48 Female Thread And M48 Male Thread, Which Is Used To Solve The Spacing Problem In Astrophotography And Eliminate A Series Of Focusing Problems.2. Eliminate Redundant Light: The Design Of Female Thread Can Eliminate Stray Light And Reflected Light, Making The Image Clearer And More Perfect.3. Variable Combination: The Required Spacing Can Be Achieved By Combining Several Extension Rings Of Different Lengths, You Can Use 1, 2, 3 Or 8 Extension Rings As Required.4. Type: Astronomic Telescope M48 Threaded 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, Using This Extension Tube Can Obtain The Correct Image Scale Or The Precise Spacing Required By The Reducer Or Field Flattener.Specification:Item Type: Length Extension Tube Kitmaterial: Aluminum Alloygross Weight: 107G / 3.8Ozextension 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 / 1.2Inthread: M48X0.75Use:Forastronomicaltelescopephotographypackage List:8 X Extending