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the EdgeHD tube has been redesigned to make sure you get the most from your optics each and every night
or combinations with simpler interference filters
Contrast is further enhanced with a new
F/ratio: F/5
this 10 mm focal length eyepiece offer incredible value in an unusually nice eyepiece
Askar f/3.9 Reducer for FRA400 Refractor - FRA400-RED Meade Closeout the EdgeHD tube has beenEffectively reduce the 400 mm focal length of the Askar FRA400 astrograph to 280 mm by adding the dedicated Askar f 3. 9 Reducer to your imaging set up! The reduction factor of the full frame FRA400 reducer is 0. 7X, and put another way, takes your f 5. 6 FRA400 refractor to a fast f 3. 9, cutting your exposure times in half! Telescope side threads are M68x1 and the camera side has M48 x 0. 75 threads that accept 2" filters as well as a M48 T ring or
