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Monday, November 23, 2020

A new photo of Sharpless 132 (Sh2-132)

 I have shot this beautiful target in Cepheus several times with a different focal length instruments. This time I have shot it with my current setup build around Tokina AT-x 300mm f2.8

Sharpless 132 in Cepheus
Click for a large image

NOTE, An apparent size of the Moon is marked as a scale at bottom of the picture frame. This is a large object! There are very few images out of this dim and diffused supernova remnant around. Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. 

A closeup 
Click for a large image

Older shots with a large instrument
Click for a large image

Image is shot at 2019 and it's a four panel mosaic, more info in this blog post,

Image is shot at 2014 and it's a four panel mosaic, more info in this blog post,

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, 6 x 1200 s, binned 1x1 = 2 h
O-III, 3 x 1200 s, binned 1x1 = 1 h
S-II, 3 x 1200 s, binned 2x2 = 1 h

1 comment:

Unknown said...

Where are the pictures taken from