What is the primary use for the Starizona M48 15mm Extension?

The primary use is to add exactly 15mm of length to an astrophotography imaging train. This is done to achieve the precise back focus distance specified by a field flattener, reducer, or other corrector, ensuring sharp stars across the entire image field.

My flattener needs 55mm of back focus and my camera setup provides 40mm. Is the Starizona 15mm Extension the right part?

Yes, this is the perfect component for that scenario. This extension is designed to add a fixed 15mm of spacing, which would take your current 40mm distance to the required 55mm total.

What threads does the Starizona 15mm Extension use?

It uses standard M48 threads. It has male threads on one end and female threads on the other, allowing it to be inserted between other M48-threaded accessories like filter wheels, off-axis guiders, and camera adapters.

Starizona M48 Extension - 15mm

by Starizona

SKU STZ-EXTM48-15

$4.95 USD - $4.95 USD

$4.95 USD

$4.95 USD - $4.95 USD

$4.95 USD

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Adds 15mm of spacing
M48 Male and Female Threads
For achieving correct back focus
Rigid, solid construction

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Starizona M48 Extension - 15mm

The Starizona M48 Extension tube adds precisely 15mm of rigid spacing to an imaging train, providing the critical distance needed to achieve correct back focus with standard M48 threaded accessories. This component is essential for astrophotographers who need to fine-tune the distance between their camera sensor and a field flattener or reducer.

Achieving 15mm of Precise Back Focus

Back focus is the exact, required distance from the rear element of a corrector lens to the camera's sensor plane. Without this precise spacing, stars at the edge of your image will appear distorted. The Starizona 15mm extension helps bridge the gap when your existing components don't quite add up to the manufacturer's specification.

Featuring male M48 threads on one side and female M48 threads on the other, this extension tube integrates seamlessly into any standard 2-inch imaging train. It provides a solid, secure connection that prevents flexure, ensuring your optical alignment remains perfect as you dial in the exact spacing your system requires.
What is the primary use for the Starizona M48 15mm Extension?

The primary use is to add exactly 15mm of length to an astrophotography imaging train. This is done to achieve the precise back focus distance specified by a field flattener, reducer, or other corrector, ensuring sharp stars across the entire image field.

My flattener needs 55mm of back focus and my camera setup provides 40mm. Is the Starizona 15mm Extension the right part?

Yes, this is the perfect component for that scenario. This extension is designed to add a fixed 15mm of spacing, which would take your current 40mm distance to the required 55mm total.

What threads does the Starizona 15mm Extension use?

It uses standard M48 threads. It has male threads on one end and female threads on the other, allowing it to be inserted between other M48-threaded accessories like filter wheels, off-axis guiders, and camera adapters.
Threads M48 (Male/Female)

Extension Length 15mm
- Starizona M48 Extension - 15mm
  
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Starizona Warranty

Starizona M48 Extension - 15mm

Will your imaging train vignette?