here's a re-processed image I did of Messier 83 at the beginning of March.
It's 7 x 4 minute exposures @ ISO-800 with the modified Canon 300D on the 12-inch f/5 GSO telescope and Baader Coma Corrector. Image is handguided with 4.5" guidescope. Images are dark-subtracted, flat fielded, offset adjusted with IRIS.
gee what a nice image, the colour representation of the blue spiral arms full of hot blue stars and the core full of older cooler stars is very accurate.
Scott
well, Umm , OK its very Nice, even has the WOW factor. Got anything a little better, ...........ok only Kidding, I would be singing in the rain with that image, true craftsmanship in that one.
Since being able to subtract dark frames, my imaging results have improved considerably (I use IRIS) and the other big help is from doing flat-field images.
I use a 1-metre-square board fixed to the inner wall of the observatory which I point the telescope at, I then turn on a hand held portable fluro light which illuminates the board. Taking an image produces a lovely flat field image that shows the dust specs and the response to light over the camera's sensor as seen through the telescope. So I don't end up with images that are brighter toward the centre of field and dougnuts are also removed from the image.
