SaratogaSkies Jim Solomon's Astropics

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M16 (Eagle Nebula)

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Image Details:

Camera: Mofidied Canon Rebel XT (350D): Hutech Type I Filter Replacement
Mount: Celestron AS-GT
Scope: Celestron C8-N (8" f/5 Newtonian)
Configuration: Prime Focus
Additional Optics: Celestron/Baader Multi Purpose Coma Corrector (MPCC)
Filter: None
Effective Focal Length: 1000mm
Effective Focal Ratio: f/5
Exposure: 28 x 4min @ ISO 400
Total Exposure: 1hrs, 52min
Date: 8/28/2005 9:01:59 PM PDT (start)
Location: Saratoga, CA, USA
Acquisition: DSLRfocus
Focus: DSLRFocus
Dithering: Manual
Guiding: GuideDog via Philips ToUcam Pro II (840k) through Orion ST80 w/ Celestron 2x "Kit" Barlow

Processing:

  • IRIS: Dark subtraction, registration
  • JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
  • Photoshop: Levels, sharpening, cropping, JPG conversion

Image Description:

This is a "do over" of M16, the Eagle Nebula, in the constellation of Serpens. M16 (NGC 6611) actually refers to the open cluster of bright, white, stars just above and to the right of the center of this photo. IC 4703 is the catalog name given to the nebula in which these bright, young stars continue to be born. The Modified camera did an excellent job at capturing the Hα (deep red) color in the nebula, while not obscuring the greenish tones in the upper-right regions. My previous attempt at M16 is still available, that one with an unmodified camera. This is the full frame, shrunk for display on the web. A full-resolution image is also availble. North is up.

 
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.