Extension tube DT-4 Verlaengerungshuelse 31,8mm (1 ¼ ")

DT-4 31.8mm 1¼" diameter extension tube

for eyepiece barrels (length 18mm)

With off-axis or folding mirror attachments, there is often the problem that normal eyepieces barrels are 1-2cm too short to really achieve sharp focus. This extension tube has filter threads for 1¼" eyepieces at both ends and can be screwed into (almost) any 1¼" eyepiece. Several 1¼" extension tubes can be combined.