ZWO 36 mm SII 7nm Narrowband Filter - SII7NMD36 Baader Hyperions This is the special optional

This is the special optional Polar Alignment Scope for the Sky-Watcher EQ8-R Equatorial Mount

good for both planetary and deep-sky work

while using a counterbalance weight system for smooth movement and reduced vibration

As you can see

ZWO 36 mm SII 7nm Narrowband Filter - SII7NMD36 Baader Hyperions This is the special optionalThe ZWO SII 7nm Narrowband Filter passes light at the 672nm wavelength with a bandpass of 7nm for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants. Use this SII (Sulfur II) with H alpha and Oxygen III narrowband filters (SHO Set) for tricolor CCD astrophotography. This ZWO SII 7nm Filter has a diameter of 36 mm and comes unmounted. It can be used in 36 mm filter wheels that