Here we have an example of an advantage of using wide angle imaging. The intersecting dust lane approaching the Cocoon nebula, C19, from left to right can be easily seen in this image . The exposure times was twenty minutes using ten minute sub frames for each RGB colour filter .A two hour exposure was used using H. Alpha filter with a composition of five, ten minute and five, twenty minute subframes and matching dark frames for the image luminance:
NGC 7000 the North America and Pelican nebula. This image is a mosaic of two images stitched together using Paint Shop Pro. Tthe images were taken on two seperate evenings . A four inch refractor was used under a clear moonless sky and steady seeing conditions. The same exposure settings were used on both evnings with total exposure times of two hours in H-alpha. and twenty minutes for each RGB colour filter:
