The T-2 / M42 × 0.75 – 9 mm Extension Tube (PrimaLuceLab, SKU: PL3304209 ) adds exactly 9 mm to the back-focus distance in optical paths using a T-2 thread, making it easy to precisely adjust the distance between the camera and the corrector or flattener.

Key Features

• 9 mm optical length – precise back-focus adjustment
• threads: internal and external M42 × 0.75 (T-2 standard)
• CNC milled aluminum body, anodized - lightweight and corrosion resistant

Set components

• spacer ring 9 mm M42 × 0.75 (T-2)

Technical parameters

• internal thread: M42 × 0.75
• external thread: M42 × 0.75
• optical length: 9 mm
• material: anodized aluminum
• EAN: 8059020773588

The PL3304209 ring is useful when exactly 9 mm is missing to achieve the nominal back-focus, ensuring proper image correction without introducing play or additional connectors.