Skip to content
Price match 30-day returns* Talk to an astronomer before you buy
Starizona SCT Corrector - Adapter for 55mm Backfocus

Starizona SCT Corrector - Adapter for 55mm Backfocus

by Starizona
SKU STZ-ADP-SCTCORR-V4
$40.00 USD - $40.00 USD
$40.00 USD
$40.00 USD - $40.00 USD
$40.00 USD
Price Match Policy!
  • Reduces SCT Corrector back focus to a standard 55mm
  • Functions as a 35.3mm T-to-T spacer
  • Features M42 female to M42 male threads
  • Available in versions for older (I/II) and newer (III/IV) correctors
SCT Corrector Version
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 SCT Corrector - Adapter for 55mm Backfocus, and how much light the corners lose.

Check vignetting
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • SCT Corrector - Adapter for 55mm Backfocus

    This Starizona SCT Corrector Adapter is a precision T-to-T spacer designed to achieve the industry-standard 55mm back focus for your imaging train. By occupying 35.3mm of the Starizona SCT Corrector's native 90.3mm back focus, this adapter leaves exactly 55mm of spacing for your camera and accessories. This simplifies your setup and ensures correct spacing for optimal optical performance.

    Achieving Standard 55mm Back Focus

    This 35.3mm adapter simplifies imaging train calculations by converting the Starizona SCT corrector's 90.3mm back focus to the common 55mm standard used by most DSLR cameras with T-rings and many dedicated astronomy cameras. For example, it provides the correct spacing for ZWO cooled cameras when using their stock 16.5mm and 21mm adapters. It is critical to select the correct version for your corrector: the "Older" adapter is for Corrector versions I and II, while the "Newer" adapter is for versions III and IV. Note that this adapter is included with the purchase of a new Starizona SCT Corrector IV 0.63x Reducer/Coma Corrector.

  • What is the purpose of the Starizona SCT Corrector Adapter?

    It is a 35.3mm spacer with M42 threads that reduces the 90.3mm back focus of a Starizona SCT Corrector to the standard 55mm required by most cameras and imaging accessories. This ensures your camera sensor is placed at the optimal distance for a sharp, corrected field.

    How do I choose between the 'Newer' and 'Older' versions of this adapter?

    You must match the adapter to your specific Starizona SCT Corrector.

    • Choose the Older (Corrector II) version if you have a Starizona SCT Corrector Version I or II.
    • Choose the Newer (Corrector IV) version if you have a Starizona SCT Corrector Version III or IV.

    Do I need to buy this adapter if I am buying the Starizona SCT Corrector IV?

    No. If you are purchasing the Starizona SCT Corrector IV 0.63x Reducer/ Coma Corrector, this adapter is already included with your purchase and does not need to be bought separately.

  • Function Back Focus Adapter
    Length 35.3mm
    Initial Back Focus 90.3mm
    Resulting Back Focus 55mm
    Threads M42 Female to M42 Male (T-to-T)
    Compatibility Options Older (For Corrector I/II), Newer (For Corrector III/IV)

    • SCT Corrector Adapter for 55mm Backfocus

      × 1

  • Starizona Warranty