ngc7000 and ic5070 again again (north america and pelican nebulae) 4h52m

2011 version redux

 

it cleared up for one night (sept 1-2) so i was able to get a few more hours in.

 

this is 76x4min (4h52m). in addition, i used HDRComposition to merge in 1/10s, 1/4s, 2s, 5s, 10s and 60s exposures to try to recover the brighter stars a little bit. not sure if i was successful.

 

comparing this (and the prior) to my 2010 version, it's clear that ISO1600 is where i should have been all along. i can't say if it's due to the ISO or the fact that i can now turn dithering on (since i'm using BackyardEOS now), there is absolutely no banding or pattern noise in the integrated result.

 

canon 50d with astrodon L filter modified by hap griffin.

canon 200L @ f/4

CLS filter

ISO1600

captured with backyardEOS

guiding with PhD (dithering on)

 

calibration, registration and stacking with PixInsight 1.7.

 

processing with Pixinsight 1.7:

- integration of 240s, 60s, etc. exposures

- HDR merge of all exposure lengths

- DBE

- extraction and re-registration of RGB channels

- DynamicPSF to get each channel's PSF

- deconvolution (100 iterations) on each channel separately, with star mask for local deringing support and luminance mask to protect low SNR regions

- RGB combine

- ColorCalibration

- histogram transformations and curves

- ACDNR

- histogram transformations on just the stars

- morphological transformation (selection, 20% amount 20%, 7 iterations) on just the stars

- SCNR (blue, green)

 

 

Done