Askar M54 Filter Drawer - M54-FD 40 mm Eyepieces 65") Angular Field of View

65") Angular Field of View 8° Linear Field of View (@1000 yds) / @1000 m) 420 ft (140 m) Exit Pupil 5

The 3nm Colour Magic Sulfur II narrowband filter is a professional astrophotography tool specifically designed for deep-sky imaging

The secondary mirror holder is CNC machined and is designed to insure textbook diffraction spikes and no alignment issues

Celestron Product Number: 44128

Askar M54 Filter Drawer - M54-FD 40 mm Eyepieces 65") Angular Field of ViewUsers have to follow the certain steps to successfully assembly the Askar filter drawer and put it into the light path to fit the whole optical system: 1. Take out the main body of Askar filter drawer 2. Choose a proper camera adapter according to the thread type of your astronomy camera 3. Fix the camera adapter on the main body with 5 M38 countersink screws and wrench of M2 4. Choose a proper telescope adapter according to the thread type of your