ic 434, the horsehead in Orion - 7 hours 10 minutes

click images for 50% full size

 

43 ten-minute subs, started as Orion was rising and continuing through dawn... This image was acquired, calibrated with both hot and warm pixel removal, then
demosaiced and stacked using adaptive scale in Nebulosity. Post processing almost entirely in Nebulosity with final amp glow removed
using layer masking, a series of curve applications, slight saturation adjustment, and jpeg in PSCS3.

Vixen ED80 at f7.5 with Hapmod Canon 350, guided using PHD, DSI Pro on the 12 inch LX200 at f6.8
--- sky very good, about 3 arc seconds, no winds, 43 degrees ...

and, with the addition of 2 hours of H alpha

 

my first try at H alpha using an Astronomik 13nm clip in filter... no sophisticated blending, just layers blending luminosity.
added a layer of the original image to correct color using color blend.. It appears to my eye anyway, that
the Ha has less defienition but a lot more detail in the whispies...

enjoy