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Tele Vue 3.5 Extension Tube for 2 Focusers
Tele Vue s 2 diameter extension tubes, available in 2 & 3.5 lengths, are handy for retaining the optical path length when replacing a star diagonal or when focus is moved out by eyepiece projection & Barlow photography. They accept 48mm filters and have anti-reflective threads & extra-long locking screws which aren t likely to fall out by accident. Tele Vue s adapters use a brass clamping ring to fully encircle the device you re attaching, as opposed to other s efforts which just use a set screw.
Tele Vue s 2 diameter extension tubes, available in 2 & 3.5 lengths, are handy for retaining the optical path length when replacing a star diagonal or when focus is moved out by eyepiece projection & Barlow photography. They accept 48mm filters and have anti-reflective threads & extra-long locking screws which aren t likely to fall out by accident. Tele Vue s adapters use a brass clamping ring to fully encircle the device you re attaching, as opposed to other s efforts which just use a set screw.
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