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Tuesday, January 14, 2020

Second light for my wide field imaging system

At January 10. I shot few lights for this busy area in Cassiopeia from the Bubble Nebula to Cave nebula. The Tokina 300mm AT-x f2.8 camera lens combined to Apogee Alta U16 camera is a very good to capturing photons. The combination of fast f2.8 optics and 9 micron pixels, (4096 x 4096 pixels) goes very deep very fast. (First light photo here,

From Bubble to Cave Nebula
Please, click for a large image!

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. The signal for ionized oxygen,.

No Stars
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An experimental starless image to show the actual nebula formation better.

Please, click for a large image!

The area of the new photo is marked as a white rectangle. Info about this image here,

Technical details

Processing workflow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Tokina AT-x f2.8 camera lens

10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and an old spotting scope of Meade LX200

Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III

Total exposure time

H-alpha, 18 x 600 s, binned 1x1 = 2,5 h
O-III, 6x 600 s, binned 1x1 = 1 h.
S-II, 2 x 600 s. binned 1x1 = 20 min.

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