Place your order by 4:00 PM EDT Monday, May 2 and your order will ship the same day. For further details see delivery estimates in cart. All orders are subject to verification. International orders are processed the next shipping day.
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.