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Focal Length Extension Tube Kit, 8 PCS Aluminum Alloy M48X0.75 Astronomical Extension Tube Kit 3 5 7 10 12 15 20 30mm Extending Ring for Astronomical Telescope Photography

4.8 (2) Write Review
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$22.96

$ 11 .99 $11.99

In Stock
  • ALUMINUM ALLOY CONSTRUCTION: Designed with an all-metal structure and anodized aluminum process, our astronomical extension tube kit ensures durability and longevity. Use this high-quality tube to obtain the correct image scale or spacing required by reducers or field flatteners
  • VERSATILE ASTRONOMICAL TELESCOPE EXTENSION TUBE: Our focus extending tube kit features M48 threaded connections and comes in various heights, including 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm, and 30mm. Enjoy compatibility with a wide range of astronomical telescopes
  • FLEXIBLE COMBINATIONS FOR SPACING: Achieve the required spacing by combining different lengths of extension rings. Our m48x0.75 focal length extension tube allows you to use 1, 2, 3, or up to 8 extension rings, providing unparalleled flexibility and convenience
  • ELIMINATE FOCUSING PROBLEMS: Our focal length extending ring features M48 female and male threads, specifically designed to solve spacing issues in astrophotography. Say goodbye to a range of focusing problems and achieve exceptional image quality
  • REDUCE STRAY AND REFLECTED LIGHT: With its unique female thread design, our telescope extension tube set effectively eliminates stray and reflected light, resulting in clearer and more images. Experience enhanced image quality like never before


Product Description

2211220010111-1

Focal Length Extension Tube Kit, 8 PCS Aluminum Alloy M48X0.75 Astronomical Extension Tube Kit 3 5 7 10 12 15 20 30mm Extending Ring

1

2211220010111-2

2211220010111-3


Features:

  • 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.
  • 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, , using this extension tube can obtain the correct image scale or the precise spacing required by the reducer or field flattener.


Specification:

  • 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


PackageList:

  • 8 x Extending Ring

Steve Davis
Reviewed in the United States on January 12, 2025
These adapters are excellent 🙂👌
C. Gregory
Reviewed in the United States on June 28, 2024
when you need a specific backfocus, these are great to have. some of the threads aren't very deep, but it never caused any issues for my use case
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