Skip to content
Price match 30-day returns* Talk to an astronomer before you buy
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm
Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm

Starizona Variable M42 (T2) Adapter 20-30mm

by Starizona
SKU STZ-VAR-M42-MEDIUM
$39.95 USD - $39.95 USD
$39.95 USD
$39.95 USD - $39.95 USD
$39.95 USD
Price Match Policy!
  • Adjustable Length: 20-30mm
  • Thread Type: M42 (T2) T-Thread
Backordered
Request Stock Alert
Availability Info
Qualifies for FREE Shipping in CONUS on orders over $350.
Vignetting Calculator

Will your imaging train vignette?

Check which filter and adapter sizes clear the sensor with the Starizona Variable M42 (T2) Adapter 20-30mm, and how much light the corners lose.

Check vignetting
  • Description
  • FAQ
  • Specifications
  • Warranty

  • Starizona Variable M42 (T2) T-Threaded Adapter 20-30mm

    The Starizona Variable M42 (T2) T-Threaded Adapter provides a continuous spacing adjustment from 20mm to 30mm for any optical train using the common M42 T-thread standard.

    A Variable 20-30mm Spacer for M42 Threads

    Achieving the exact back focus distance required by a field flattener or reducer is critical for sharp stars across the entire image field. The Starizona Variable M42 T-Threaded Adapter simplifies this process by offering a continuous adjustment range between 20mm and 30mm. This single component replaces a collection of fixed-length spacers, allowing you to make fine, incremental changes to find the perfect distance for your specific optical setup. For spacing needs outside the 20-30mm range, Starizona also offers 15-20mm and 30-40mm versions.

  • What is the adjustment range of the Starizona Variable M42 Adapter?

    This version of the Starizona Variable M42 Adapter has an adjustable length from 20mm to 30mm. It is designed for optical trains that use standard M42 T-threads.

    How does the Starizona 20-30mm Adapter help when setting back focus?

    Reducers and flatteners require a precise distance to the camera sensor for optimal performance. The Starizona 20-30mm adapter allows you to make fine adjustments to this spacing within its range, helping you dial in the exact distance needed to achieve sharp stars across your field of view without needing a large set of fixed spacers.

    What threads does the Starizona 20-30mm Variable Adapter use?

    The adapter uses standard M42 T-threads, also known as T2 threads, for both its male and female connections.

  • Thread M42 (T2)
    Adjustable Length 20-30mm
  • Starizona Warranty