"Doug W." wrote in message
...
That looks good!... I assume 3 min. subs to avoid saturation... talk about
light grasp....
yes, that's right Doug. The Dream Machine, even with 180,000 electron well
capacity, will saturate on the core of the smaller galaxy if I go past three
minutes unfiltered.
the camera has amazing QE and the 24 x 24 micron pixels really grab the
light
here's the photon transfer curve for the camera
--
Regards, Doug W.
www.photonsfate.com
"Richard Crisp" wrote in message
...
what a difference in the forecasts from the NWS toward the end of this
week versus the beginning. Thurs was clear, but the seeing was a bit
disturbed.
I went ahead and imaged anyway, queuing up about 3 hours of exposure and
went to bed
When I got up at 3am to image some summer nebulae, I found that I had 39
x
3 minutes good enough to process
so here is 3 minutes shy of 2 hours exposure, unfiltered, from the 18"
cass, FLI Dream Machine camera and the AP1200GTO mount.
http://www.narrowbandimaging.com/m51...camel_page.htm
even though I have imaged M51 many times, it seems that every time I do
it
I find another reason to like this most interesting pair of galaxies.
I may even make a color image from it this time