View Single Post
  #7  
Old 09-08-2009, 01:09 PM
kinetic's Avatar
kinetic (Steve)
ATMer and Saganist

kinetic is offline
 
Join Date: Jun 2008
Location: Adelaide S.A.
Posts: 2,293
The trouble with repros is you can never get something from nothing

When I culled out the worst frames from the 217 to eliminate
the elongated stars....the noise comes up
I know from experience that, even on a moonlit night,
if I can have the faint spiral arms JUST above the noise threshold, then
my method of taking LOTS of short exposures brings up the data
out of the noise.
However, if I cull the frame list a bit, the data sinks back into the noise.

This repro has slightly sharper stars....no sharpening or noise smoothing
has been applied....but the noise is higher.
Again, looks bearable on the dome CRT...but shocking on the laptop.

NEEDS no moon...needs lots more frames...flats...all the obvious
Also attached is the galaxy core 2x with a different curve applied.

Steve
Attached Thumbnails
Click for full-size image (best98_qm_hist_.jpg)
108.6 KB18 views
Click for full-size image (core_curve.jpg)
49.5 KB21 views
Reply With Quote