Tele Vue 2" Extension Tube X2C-0008
Item No. 704-60020
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Manuf. No. Televue X2C-0008
2" long, 2" diameter extension tube, used for photographic purposes with many Televue refractors.
This 2" long extension tube is necessary when doing photography through many scopes. It provides the necessary focus distance when the 2" diagonal is removed. Some scopes, such as the TV-101 & 102, require both the 2" and 3.5" extension tube (before inserting the camera adapter) in order to allow proper focus photographically.
One end of this 2" diameter x 2" long extension tube fits into 2" focuser drawtubes. The opposite end is a 2" diameter eyepiece holder that uses a non-marring brass clamp ring to hold 2" eyepieces and accessories in place. The captive thumbscrew that tightens the clamp ring canýt be lost in the field. This extension tube makes up for the loss of light path photographically when a 2" star diagonal is removed from many scopes and replaced by a camera and camera adapter. TeleVue NP-101, TV-102, and Renaissance-102 scopes require both a 2" and a 3.5" extension tube in front of the camera adapter to reach proper photographic focus, so some experimentation may be called for to see if this tube alone is long enough for use with your particular telescope focuser.