SaratogaSkies Jim Solomon's Astropics

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M65 (Part of the Leo Triplet)

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: 100mm
Effective Focal Ratio: f/5
Exposure: ~14min @ ISO 800 and 1600
Total Exposure: 0hrs, 14min
Date: 5/8/2004 11:20:54 PM PDT (start)
Location: Saratoga, CA, USA
Acquisition: Manual
Focus: DSLRFocus
Dithering: None
Guiding: None

Processing:

  • IRIS: Dark subtraction, registration, and stacking
  • JimP: White balance, ASINH stretching
  • Neat Image: noise reduction
  • Photoshop: Levels, cropping, scale, JPG conversion

Image Description:

This was an attempt at capturing the Leo Triplet. By confusing my directions I managed to frame this wrong and capture only M65 (right) and M66 (left). NGC 3628, the third in the Triplet, will have to wait for another day. North is up, though I really wish I would have realized this simple fact at the time. D'oh!!!!

Update 3/18/2005: This is a reprocessed stack of a hodgepodge of frames and exposures ranging from 30sec to 2min at ISO 800 and 1600. Amazingly, IRIS was able to scale, translate, and rotate all of these frames in order to align them, even though their intersection was only a tiny fraction of the entire sensor's range. Way to go IRIS! Obviously, this image needs much more exposure to bring out the faint spiral arms of these galaxies. And, since the framing was all messed up, most of the frames were captured in the "severe coma" portion of the field, which is why the stars show significant signs of coma. But as my first DSO image with the 300D, this ain't too shabby!

 
IC 1287 (Reflection Nebula)
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:

IC 1287 (Reflection Nebula)

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: 10 x 4min @ ISO 200
Total Exposure: 0hrs, 40min
Date: 8/4/2004, ~11:40 PDT
Location: Saratoga, CA, USA
Acquisition: DSLRfocus
Focus: DSLRFocus
Dithering: None
Guiding: GuideDog via Philips ToUcam Pro II (840k) through Orion ST80 w/ Celestron 2x "Kit" Barlow

Processing:

  • IRIS: Dark subtraction, flat frame, registration, Kappa-Sigma stacking, and noise reduction
  • Photoshop: Color mixing, cropping, image scale, JPG conversion

Image Description:

IC 1287 is a very faint reflection nebula in Scutum. This is my second guided image. Thanks much to Jim Shuder for bringing his guiding apparatus over to my house for a fun evening of imaging. (See the comments in the B86 Image for details on the guiding infrastructure.) This is approximately 2/3's of the full frame, scaled for display on the web. North is up.

It's interesting to compare this version with my original unguided version. This one shows much tighter stars and much more of the faint, blue nebulosity. Now, to be fair, the guided version has twice the effective exposure length as the unguided version. But that was because nearly 2/3's of the unguided exposures were unuseable messes, due to smearing and poor tracking. Seen another way, in the unguided version I collected 60min of frames, of which only 20min were useable. In the guided version, Jim and I collected 40min of frames, of which all were useable. Bottom line: I'm convinced; I need to begin guiding.