This closeup shows the center of the large Soul nebula in Cassiopea.

Imaged over several nights in October_December 2016
S2-Ha-O3 mapped as RGB
RGB for the star colors

Ha - 30X900sec
O3,S2 - 20X600 sec each
RGB - 30 min each

Total about 16 HRS

All images at Bih 2 = 0.89" per pixel (so 16 hrs at bin 2 equals 64 hrs in bin 1...)

C14 equipped with Starizona SCT corrector (operating at F7.2)
ASA DDM60 - no guiding :)
Imaged from my home in Gan-Yavne ISRAEL