This is an image from last night's efforts on a dozen or so variable
stars. I took a series of shots of M-33 and combined them in MaxImDL
and Photoshop to get this result:

http://www.regulusastro.com/regulus/photos/text/m33_lrgb_st8.html

The details:

Scope: FSQ-106n f/5
CCD: ST-8XME with CFW-8 LRGB filters at -25C
Mount: Losmandy G-11
Times: Luminance: 30 minutes
Red: 10 minutes
Green: 10 minutes
Blue: 16 minutes
Processing: Flats, bias and darks all used. RGB and luminance
masters were made in MaximDL, then they were brought into Photoshop
for luminance layering, a la Gendler. I am still working on the
levels a bit.

Clear Skies,

~johnb