7.5 hours of M42 in [SII]/Ha/[OIII]

Comment

Comment by Richard Crisp on July 4, 2011 at 11:57am

hey thanks guys

with a reasonably strong signal like in M42 (all filters too!) and with a low noise camera like my Proline 3200, there is very little penalty in taking ots of short exposures.

I think the exposure time pushout is less than 15% in this case vs taking much longer ones.

for the KAF3200, one has to deal with blooming in exchange for the high QE so it is really a challenge to take long exposures unless you want to layer long ones with short ones to get the trapezium region.

I personally avoid all that processing hocus-pocus and try to stick with very straightforward processing like I used for this.

my flow is calibrate, register and stack each filter's data, then DDP (without sharpening: use the USER filter with all positions set to "0" except the middle one set to "1") and then I pull it into Photoshop to color combine and then adjust curves and levels and maybe a very light unsharp mask followed by color noise reduction using the photoshop filter but very light on it too. by light I mean less than 35%

Comment by Trevor Woodrow on July 4, 2011 at 11:12am

Fantastic...as always Crisp, big fan...resoved to the core and made detail throughout...but still maintaining the smokey gasey feel. Well done.

1.5min exposures...so the core resolution achieved with stretching?

Comment by Dave Lane on July 4, 2011 at 9:19am

Love it

Comment by samiam on June 30, 2011 at 6:46pm

This is crazy cool !