The M48 × 0.75 – 1 mm spacer (PrimaLuceLab, SKU: PL3304801 ) enables very precise back-focus correction by just 1 mm in optical paths using the M48 thread.

Key Features

• optical length 1 mm – micro-adjustment of the back-focus distance
• threads: internal and external M48 × 0.75 – full compatibility with correctors and cameras
• full 2" aperture – no vignetting for APS-C matrices
• lightweight anodized aluminum ring – corrosion resistance

Set components

• spacer ring 1 mm M48 × 0.75

Technical parameters

• internal thread: M48 × 0.75
• external thread: M48 × 0.75
• optical length: 1 mm
• material: anodized aluminum
• EAN: 8059020773656

The PL3304801 ring is the ideal solution when a single millimeter is missing to achieve the nominal back-focus required by correctors or focal reducers in astrophotography.