I want to do more then just look.
Thomas Watson - Author of Mr. Olcott's Skies. Available in paperback and ebook formats. Weblog: Under Desert Stars
-EricParks Astrolight EQ6 (6" f/6 Newt)10x50 Bushnell Binoculars
Visual deep sky 18" f4.3 David Lukehurst dob 8" f/6 Dark Star dob 8x42 binos 100% visual observing...
Quote:After the sketch has been scanned into the computer I flatten the field by increasing the brightness by 20%. This wasn't really necessary for this particular sketch, but if your scanner produces a band of shadow on half the image, or your page has been adversely affected by dew this is an effective way to eliminate these artifacts: