2'' TUBE EXTENSION - 50mm Power this filter is needed to

this filter is needed to cut off unwanted wavelengths in colour cameras which are sensitive to these radiations

The best way is to calibrate it is using test images:

CNC milled from a solid block of aluminium with an anodized black matte finish

High quality large diameter

In equatorial mode the AZ-EQ5 shows all its potential in astrophotography

2'' TUBE EXTENSION - 50mm Power this filter is needed toExtension tubes are used when the optical tube is too short and the focuser has not enough travel to reach the focus. This accessory increase the optical path of your telescope of 50mm. The tube includes two thumb screws to secure the camera or the accessory used. The internal compression ring avoid any scratch on your accessory. The bottom part is threaded (M48x0. 75) to allow the connection of standard 2" filters. The safety groove stop the