This is an image of Crux from data taken with a Canon 300mm F2.8L and a Canon 5DH. It is actually at nearly twice (X1.9) the native sensor pixel size. That is 47 Mega Pixels versus 12.5 Mega Pixels. It has to be this large to show the detail.
With these methods I have managed to make the 12.5 Mega Pixel sensor of the Canon 5DH perform like a 47 Mega Pixel sensor. This can only happen if the lens or telescope has far better resolution than your sensor or in other words the image is under sampled.
hi Bert
Thanks for posting such a clear demonstration of the benefits of super-resolution reconstruction through dithering. Its a great way to increase the flexibility of a system isn't it? - if the seeing is poor, process normally, if the seeing is good, use super-res to increase the image scale (by 2 say) and increase the number of subs (eg by 4x). All without changing the system at all - its sort of like having a "resolution" switch on the side of the camera. I guess you could get the same flexibility by binning images from a larger camera in poor seeing, but then you would have to buy the larger camera in the first place. The only problem I have found is that the tracking mount need to be pretty good - super-res very effectively enhances trailed images and I have ended up with long, thin stars instead of eggs at times. BTW, I use Nebulosity, which automates the process, linking to PHD to do random dither between subs. Sorry about the long-winded post, but this is a fascinating subject.
