Baader M54 Extension Tube 5 mm

Baader M54 Extension Tube 5 mm

Description

The Baader M54 Extension Tube – 5 mm is a high-precision spacer used to finely adjust the optical distance between a camera and a telescope or corrector. It is built from high-quality aluminum and features an exact optical path length of 5 mm.

It provides a female M54x0.75 thread on the telescope side (3.5 mm deep) and a male M54x0.75 thread on the camera side (3 mm long), making it fully compatible with Baader's modular M54 system.

Unlike the older T-2 standard which used 5 mm thread depths, this extension ring adheres to the modern 3 mm norm to accommodate the increasingly compact backfocus requirements of current astro-cameras. It enables secure mechanical coupling without binding or misalignment and maintains optical integrity throughout the imaging train.

This adapter is particularly useful when fine-tuning the sensor position relative to focal reducers, flatteners, or filters, while maintaining a wide, stable thread connection ideal for heavy or large-format cameras.

Technical specifications

• Manufacturer: Baader Planetarium

• Product code: 2958705

• EAN: 4047825052223

• Thread system: M54x0.75

• Telescope side: Female thread, 3.5 mm deep

• Camera side: Male thread, 3 mm long

• Optical length: 5 mm

• Inner diameter (clear aperture): 51 mm

• Outer diameter: 59 mm

• Adapter type: Extension

• Material: Machined aluminum

• Net weight: 0.01 kg

• Adapter family: M54 system