Here is a full res RGB image 5MB
http://d1355990.i49.quadrahosting.co...SNR_P1_RGB.jpg
It is obvious how dim the Vela SNR really is.
Here is the narrow band image 5MB
http://d1355990.i49.quadrahosting.co...VSNR_P1_NB.jpg
This is a screen capture of EasyHDR where I used these two images to blend the RGB and NB. 3MB
http://d1355990.i49.quadrahosting.co...2/screenP1.jpg
The advantage with this method is that you can set the EV difference to change the mix of RGB and NB. It allows full control of saturation, contrast and curves while using all the data of both images. The algorithm that EasyHDR uses to match data in different length exposures is based on the human visual response. This produces a far more 'natural' HDR image.
The result is all the stars now have their RGB colours and the faint emission nebulae are enhanced by the NB data. The dim and dark dust is also rendered realistically.
Bert