The M48 × 0.75 – 7 mm extension tube (PrimaLuceLab, SKU: PL3304807 ) allows you to precisely increase the back-focus distance by 7 mm when required when configuring correctors, flatteners or filters in the M48 standard.

Key Features

• 7 mm optical length – precise back-focus adjustment
• threads: internal and external M48 × 0.75 – wide compatibility
• full 2" aperture – no vignetting for APS-C matrices
• CNC milled body made of anodized aluminum - lightweight and corrosion resistant

Set components

• spacer ring 7 mm M48 × 0.75

Technical parameters

• internal thread: M48 × 0.75
• external thread: M48 × 0.75
• optical length: 7 mm
• material: anodized aluminum
• EAN: 8059020773601

The PL3304807 extension allows for quick and stable back-focus adjustment in M48 tracks, supporting optimal sharpness and image correction in astrophotography.