ZWO EFW 7 x 50mm SQUARE FOR ASI461MM PRO 3nm The absolute encoders on both

The absolute encoders on both axes allows to obtain a typical tracking error below 1 arcsecond

and features three cooling fans at the rear to rapidly cool the primary mirror

81 mm diagonal)

Counterweight kit for CDK14 & CDK20 attaches to the dovetail bar for critical balance in Declination

whereas the dark absorption "splits" and occurs slightly above and below the typical wavelength where light from non-magnetized activity is absorbed

ZWO EFW 7 x 50mm SQUARE FOR ASI461MM PRO 3nm The absolute encoders on bothThe ZWO EFW 7 x 50mm electronic filter wheel was designed for the medium format ASI461MM Pro, which requires 50mm square filters to minimize vignetting across its huge sensor. The EFW 7 x 50mm is CNC machined from a solid block of aircraft aluminium and has an optical thickness of only 16mm. The stepper motor is made in Japan by NPM and has very high precision and reliability. The filter wheel is bi directional, making filter changes very quick. Note: