Mount your widefield cameras or other devices to Celestron or Meade Schmidt-Cassegrain and Maksutov telescopes using the Baader Short T-Adapter from Alpine Astronomical. This adapter has a 16mm optical path length and features one 2" diameter female thread for mating with your telescope's output port and a standard T-2 male (M42 x 0.75) thread for connecting your viewing or photo equipment.
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I recently purchased a Nexstar C5. I wanted to replace the 1 1/4" Visual back adapter and supplied diagonal. The Baader Short T adapter allows the use of the Baader T2 prism on this telescope. This combination has full clearance from the drive base at zenith. Some thing that you have to be very careful of when you replace any of the optical path with larger or better products. It also allows for clearance when the Celestron Wi-Fi adapter is inserted into the base. For the smaller nextar mounts the adapter is almost directly under the telescope but at an angle. The combination of this T adapter with the prism is very efficient tight and requires no set screws. It absolutely looks like how this mounting should've been done originally. Please note that the prism is the smallest T2 diagonal that Baader makes with the 32 mm clear light path. And normally comes equipped with an 1 1/4" nose piece on one side and an 1 1/4" eyepiece holder with helical fine focuser on the other. Simply unscrew the nosepiece from the prism and replace it with this short T adapter. There are larger diagonals with both mirror and prism in the Baader line and I cannot vouch for clearance with those models.