|
hOughy just download it and play with it with terrestial images.
Steve my 5DH has 12 bit A to D converter. So for image aquisition we have a dynamic range of 12 bits. The human eye can see a huge dynamic range from dim star light to full Sun.
Astro images have the same problem they can only be recorded faithfully at 12 or 16 bits yet we have a much greater range in the objects we wish to image, pick a number!
All this program does is map the very wide dynamic range into a far thinner dynamic range. The JPG image is only 8 bit!
One further thing this image shows how good the Canon 300mm F2.8L is, as not all stars are bloated due to overexposure.
Bert
|