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SVBONY SV109 M48 Variable Extension Tube 24–35 mmSVBONY SV109 M48 Variable Extension Tube is a precision spacing adapter designed for astrophotography imaging trains. With an adjustable length range of 2435 mm and M480. 75 threads on both sides, it allows accurate back focus tuning for cameras, flatteners, and reducers. Key Features Durable anodised aluminium construction Manufactured from high quality aluminium alloy, providing rigidity and low weight for stable imaging setups. Internal anti
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SVBONY SV109 M48 Variable Extension Tube is a precision spacing adapter designed for astrophotography imaging trains. With an adjustable length range of 24–35 mm and M48×0.75 threads on both sides, it allows accurate back-focus tuning for cameras, flatteners, and reducers.

SVBONY SV109 M48 variable extension tube with anodised aluminium body.

Key Features

  • Durable anodised aluminium construction
    Manufactured from high-quality aluminium alloy, providing rigidity and low weight for stable imaging setups.
  • Internal anti-reflection threading
    Internal threads help suppress stray light and reflections, improving contrast and image clarity during long-exposure imaging.
  • Adjustable spacing (24–35 mm)
    Variable length design allows fine tuning of optical spacing to meet the back-focus requirements of flatteners, reducers, and camera sensors.
  • M48×0.75 threads on both sides
    Standard M48 threading ensures compatibility with common astrophotography cameras, filter drawers, and optical accessories.
  • Solves focusing and spacing issues
    Provides precise control over image train spacing, helping achieve sharp focus and correct image scale.

Design & Adjustment

SV109 M48 variable extension tube showing adjustment range.
SVBONY SV109 M48 extension tube dimensions and thread specifications.

Separated Components

The extension tube can be separated and adjusted smoothly, allowing precise control over spacing without introducing tilt or misalignment.

SV109 M48 variable extension tube shown separated into components.

SVBONY SV109 M48 Variable Extension Tube 24–35 mm

Item no : 50005926067
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US$ 15.99
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Ships within 48 hours · Estimated delivery Jun 23 - Jun 28

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US$ 15.99

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US$ 11.19

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US$40

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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