Quote:
Originally Posted by Tandum
Leon, Ha Hb So OIII are bandwidths of light which are beyond visible light and below infrared light. A modified camera can detect this light and records it in the red pixels on it's sensor. Using filters to capture these various light frequencies allows you to map these channels to different colours in post processing, resulting in some of the amazing images we see today.
You'd really want a mono camera to do it justice as your modified canon can only see them in it's red channel which is only 25% of the sensor. This means exposure time needs to stepped up by 4x when using a colour camera.
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True but not impossible
I have had some small degree of success with a DSLR and an ED80
eg
http://www.flickr.com/photos/9178472...71841/sizes/l/
and a single shot colour camera (QHY8 ) and ED80
eg
http://www.flickr.com/photos/9178472...89812/sizes/l/
would you be happy with similar results?
sure a dedicated mono would be better but the single shot comes in handy when you want to shoot a colour image..if you dont have a permanent observatory it may be a challange to colect data through filters over many nights to construct aRGB or LRGB image
I think it was Alen Chen from memory at one of the Advanced AstroImaging confrences maybe a year or so ago? who put together a presentation showing the fine results he has got in narrowband with a single shot colour camera, so I am certainly not alone .
dont rule it out is all I am saying