SaratogaSkies Jim Solomon's Astropics

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M42 (The Great Nebula in Orion)   [obsolete]

Image Details:

Camera: Nikon D100
Mount: Celestron AS-GT
Scope: Celestron C8-N (8" f/5 Newtonian)
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 1000mm
Effective Focal Ratio: f/5
Exposure: 1 x 60sec @ ISO 1600 (nebula), 1 x 10sec @ ISO 1600 (trapezium)
Total Exposure: 0hrs, 1min
Date: 3/22/2004, 8:45 PST
Location: Saratoga, CA, USA
Acquisition: Manual
Focus: Manual
Dithering: None
Guiding: None

Processing:

  • Photoshop: Dark subtracktion, registration, compositing, levels, color balance, image scale (1/4 x), JPG conversion

Image Description:

This is my first ever DSLR image! Thanks much to Jon L. for letting me borrow his Nikon D100.

Some interesting notes about this image. The vertical "trail" at the bottom, center of the image is a diffraction spike from the bright, mag 2.5, star, Iota Orionis, which is just south of the field of view of this photo. The faint, horizontal line in the lower-right portion of the image is a meteor trail or a photographic defect. Not sure which. The distinct nebula above the main one is M43.

 
M22 (Globular Cluster)
SaratogaSkies Jim Solomon's Astropics

Search

Latest news

December: Test shots with new scopes/mounts

Dec 21: TMB 80/480 Arrives!

Dec 3: AP1200 Arrives!

Nov 30: TMB 152/1200 Arrives!

Links:

M22 (Globular Cluster)

Click to see high-res version.

Image Details:

Camera: Canon Digital Rebel (300D)
Mount: Celestron AS-GT
Scope: Celestron C8-N (8" f/5 Newtonian)
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 1000mm
Effective Focal Ratio: f/5
Exposure: 20 x 1min @ ISO 800
Total Exposure: 0hrs, 20min
Date: 7/14/2004, ~1:30am PDT
Location: Saratoga, CA, USA
Acquisition: DSLRfocus
Focus: DSLRFocus
Dithering: None
Guiding: None

Processing:

  • IRIS: Dark subtraction, flat frame, registration, Kappa-Sigma stacking, background fit
  • Photoshop: Crop (1/2 x), image scale (1/2 x), JPG conversion

Image Description:

This image was taken under some pretty poor conditions: both the transparency and the seeing were pretty bad, and a ton of dew was accumulating on all of the equipment. It's times like these that I'm glad I have a Newtonian reflector, as an SCT would have been eaten alive by the dew. M22 is a larger and brighter globular cluster than M13, although the latter seems to get all of the attention in the Northern Hemisphere. Perhaps it's because M22 is in Sagittarius and therefore doesn't stand out from the Milky Way stars as well as M13 stands out from its background in Hercules. At the eyepiece, M22 is the better sight in my humble opinion. Of course, both of these pale in comparison to Omega Centauri, which is very difficult to view from mid-Northern Latitudes since it is so far south of the Celestial Equator. North is up.