First Light for Baader Ultra Narrowband

[Whistlin Bob]

Bought a set of Baader Ultra NB filters (Ha=3.5nm, Sii & Oiii=4nm) last week. Turns out the "Clear Skies Guaranteed" on the side of the box is accurate- filters delivered on Friday and clear skies ever since. @FLO- if only you'd told us good weather could be purchased...

Gave them a run on Cygnus Wall last night, with 50 mins per channel at gain 250, 120s per sub. Imaging rig is an old blue tube 200p on an HEQ5, using an ASI1600mm camera.

In comparison with the 7nm ZWO filters they've replaced first impressions are more nebula signal with smaller stars as you'd expect, and there were no gradients- even on the weaker O and S channels. Pretty pleased, now to try them on a brighter target to check out the haloes.

Presentations here are SHO and HOO