On Oct 31, 2006, at 6:12 PM, Walter Hamler wrote: > No, you don't multiple expose the same frame. You take multiple > frames(many > exposures) then use specific software designed for the purpose to > "stack" > the images to net one better image. There are several folks who > specialize > in this software, from relatively cheap to relative expensive. They > are all > designed around using with telescopes and either dslr cameras or > ccd cameras > specific to astrophotography. It turns out that the Canon cameras > are very > well suited for this purpose, followed by the Nikon D50. The new > D200 is > also very promising. > My isdDL is pretty noisy at exposure times longer than 3 minutes > and iso's > above 800.
During the Mars close approach round about 2003 I fitted a web-cam to my telescope and tracked Mars through an evening's viewing. Some of this kind of software stacked and layered it, rendered it into a 40 second movie, the results were astonishing. You could see the planet turn, identify features and stuff. Now I know I have it around here on my archive drives somewhere... sigh Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
