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Eastern Cygnus

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About this observation
Observer
Clive Nanson
Time of observation
08/08/2019 - 17:09
Object
Eastern Cygnus
Observing location
Leicestershire and Essex
Equipment
Canon EOS 200D
Canon EF 100mm F2.0 USM
Homemade camera drive
Exposure
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Having returned from holiday I decided to re-process the image of the Veil Nebula taken from Essex and combine it with the image of the North America Nebula previously taken from my home in Leicestershire.  Mosaicing the images was straight forward using IRIS but re-processing the images to achieve a reasonably close white balance between the two was much more problematic. The Essex image had an effective exposure time of 135 min taken under a sky where I could actually see the Milky Way whereas the Leicestershire image only had an effective exposure time of 30 min taken under a sky where I can't see the Milky Way.  I can't say I've achieved a perfect match, but if you hide the image offsets, the joint becomes harder to see.

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