M42. NGC1976 The Great Nebula in Orion . This image is a cropped version using a combination of exposures using RGB and narrowband filters . Unsharp masking was used to enhance the fine detail mostly with in the core region . This was done by subtracting a blurred copy of the existing image from the original image. This removes the blurred unwanted information . This technique is used by many astro-imagers . Exposure times of twenty minutes for each RGB colour filter with sub frames ranging from 60 seconds to 5 minutes because M42 has a great dynamic range. Variation in surface brightness and over exposing the CCD would saturate its core region. The exposures for the narrow band data H-alpha and Olll were 60 minutes using 60 second and 5 minute sub frames:
IC 1805 The Heart nebula . This image was taken under bright moon light with very clear sky conditions . Two narrow band filters, H-alpha and Olll were used making this image a bi-colour image . The ten inch, f/4.8 reflector was used with PHD auto guiding. The exposure times were sixty minutes for each filter using five minute sub frames:
