Askar f/3.9 Reducer for FRA400 Refractor - FRA400-RED Meade Closeout 1 arc second Tracking Automatic

1 arc second Tracking Automatic Tracking Rate celestial

F/ratio: F/5

5 kg) Counterweight

5") Weight 6 oz (170

unlike Barlow lenses which diverge rays)

Askar f/3.9 Reducer for FRA400 Refractor - FRA400-RED Meade Closeout 1 arc second Tracking AutomaticEffectively 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