ZWO 7nm NARROWBAND FILTER SET Cooled A series of auxiliary functions

A series of auxiliary functions is provided to help the user to a quick alignment of the mount to the celestial pole

1mm AR protecting window are listed as below:

General Equatorial and Altazimuthal GoTo system stepper motor based with programmable Gear Ratio (1234

a flat field and a small obstruction caused by the secondary mirror

400 mm length

ZWO 7nm NARROWBAND FILTER SET Cooled A series of auxiliary functionsZWO 7nm narrowband filters enhance the contrast of emission and planetary nebulae. These peculiar nebulae emit light only in specific wavelengths (H; OIII; SII) and the narrowband filters have the property to reject all light outside these bands. The passing band or "window" of these filters is 7nm wide. Considering that the visible light spectrum is between 380nm and 740nm, a 7nm filter would block 98% of the unwanted light. As a result, the signal