T-2 Extension Tubes enable you to securely set or vary the spacing between T-2 components. The tubes are available in three lengths, 7.5mm, 15mm, and 40mm, and are provided with an internal T-2 thread at one end and an external T-2 thread at the opposite end. Full internal threading and blackening kills any stray light reflections.
OPTICAL TUBE LENGTH 40
T-2 PART # 25B
USAGE for eyepiece projection with sliding focuser
INNER DIAMETER / CLEAR APERTURE 38mm
OUTER DIAMETER 46mm
INNER CONNECTION (LENS SIDED) Thread, T-2 (M42 x 0,75)
OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, T-2 (M42 x 0,75)