Comparative Messier Digital Object Sketches With 11x80, 20x100 and a Tasco
60mm/700mm
Version 1.0 of 12/9/2004-1:00 a.m.
On this page the author is attempting a careful electronic sketch simulation
of what he saw while on the Antiparos island, with his equipment:
Chinon BCF 11x80 binoculars, Apogee multicoated 20x100 binoculars and his crappy Tasco 60mm/700mm at 35x.
The Tasco has been fortified with a good zoom 22-7.4mm eyepiece from
Apogee, a 45 degree diagonal (so all images are erect) and a shorty 2x
Barlow, which he rarely used.
The author is more concerned with giving the sketches a realistic appearance, i.e. for them to represent well what an observer sees through the above equipment.
All the sketches were digitally processed using Photoshop from observations made on average
6.7+ skies. Contrast and brightness have
been changed sometimes globally, sometimes locally and extended star
images have been antialiased, where applicable,
although the author is paying more attention to extended objects and not star
images, aiming at a realistic simulation.
Calculations for the digital processing assume correct fields of
vision of all three instruments and changes in brightness according to
what the author saw, in most cases. Occasionally, field edges have been
cropped, to save space and time. The processing has been done on a
Presario 2100 laptop with its screen at full brightness.
For the full observing reports, consult the two articles on 11x80 and 20x100.
For all pictures below: Left: 11x80 Chinon binoculars, Middle: 20x100
Apogee binoculars, Right: Tasco 60mm/700mm@35x.
M31-M32-M110 (Andromeda Galaxy and satellites) in
Andromeda.