M68M to M54M Adapter – 1.4mm Back Focus

This precision-machined M68M to M54M adapter is designed for astrophotography imaging trains where extremely accurate back focus spacing is required. With an ultra-thin mechanical thickness of just 1.4mm, it allows fine spacing adjustment without exceeding reducer or flattener back focus limits.

Ideal for converting between M68 and M54 threaded components, this adapter is commonly used in advanced imaging setups involving focal reducers, field flatteners, filter wheels, off-axis guiders, and cameras.

CNC-machined to tight tolerances and finished in matte black to minimise internal reflections, it provides a clean, secure, and professional-grade connection within complex astrophotography imaging trains.

Key Features

• M68 male to M54 male thread conversion
• Ultra-thin 1.4mm back focus for precise spacing control
• CNC-machined for accuracy and durability
• Matte black finish to reduce internal reflections
• Designed for advanced astrophotography imaging trains

Specifications

• Thread A: M68 × 1 (Male)
• Thread B: M54 × 0.75 (Male)
• Optical / Mechanical Length: 1.4 mm
• Material: Aluminium alloy
• Finish: Black anodised

What’s Included

• 1 × M68M to M54M Adapter (1.4mm back focus)