NGC7000 (my first color narrowband integration)

[jbrazio]

My first color integration of narrowband photography.

64x Ha, 64x O3, 64x S2.
Calibrated with Bias and Darks.

Total integration time: 9.6h

Guided EQ6
ED80 with 0.85x FF
ASI1600MMC (30 Offset, 200 Gain, -20C)

Any improvement advice you could share with me would be helpful.

View full size, view my gallery on Flickr

Image Plate Solver script version 4.2.7
===============================================================================
Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):
           -3.47994e-07        +0.000417394           -0.188215
           -0.000417267        -6.12786e-07           +0.835629
                     +0                  +0                  +1
Projection origin.. [2001.958931 452.598208]px -> [RA:20 58 47.000 Dec:+44 19 48.00]
Resolution ........ 1.502 arcsec/px
Rotation .......... -89.943 deg
Focal ............. 521.71 mm
Pixel size ........ 3.80 um
Field of view ..... 1d 56' 35.1" x 1d 28' 8.4"
Image center ...... RA: 21 01 49.614  Dec: +44 11 26.26
Image bounds:
   top-left ....... RA: 20 57 42.940  Dec: +45 09 54.93
   top-right ...... RA: 20 57 44.489  Dec: +43 13 21.63
   bottom-left .... RA: 21 06 02.843  Dec: +45 08 56.48
   bottom-right ... RA: 21 05 48.150  Dec: +43 12 26.65
===============================================================================

 

[Tim]

It is very nice, and combining in this way opens up the sky to a whole world of personal interpretation and artistic expression.

I'm only viewing on work's dodgy monitor, but from this view I'd say a little more contrast would give the "wall" a bit more punch.

If you are using Photoshop, try the following, 

CTRL +J  (new layer)

Set blend mode to "Soft Light"

Set opacity to 25 or 30% to taste, and see how it looks.

This method will give you a subtle local contrast enhancement, and edify the saturation.

Cheers

Tim

[wimvb]

Nice image. But I agree with Tim, could do with a bit more contrast. If you process just the Ha, you may get a feel for how far you can take it.

Btw, you also seem to have diffraction artefacts from the microlenses on the ASI 1600 chip.

 

[jbrazio]

Thanks both for the advice !

Indeed I did the test as Tim suggested and it really gives the image a huge "punch". If I'd like to do the thing in PixInsight is it possible ?

The micro lens issue seems to be present on the ED80 with the focal reducer as far as I can tell. Some people suggest to change the focal train a bit and see if it improves, I hadn't yet had an opportunity to try something like that.

 

btw in post processing can we do anything about the artifact ?