The California Nebula is an emission, Hα, nebula located 1000 light years from Earth in the constellation Perseus. This name was given because of the resemblance to the United States state of California.
I wanted to test the performance of my camera with an emission nebula. The California was chosen because it's big and was high in the sky. From the results of this project it can be concluded that i really need to modify my camera.
120 seconds is the maximum exposure time i can have with only a polar and 3 star alignment and without guiding. Even with guiding and without a light pollution suppression filter (LPS) will be difficult to increase exposure time.
Image Data: NGC 1499 California Nebula
Lens/Scope: Sky-Watcher 80mm
Focal Length: 400mm
F/Stop: f/5
Exposure: Stack of 116 120-second exposures (3:52 hours total exposure)
Mount: Sky-Watcher HEQ5 Pro SynScan GoTo (CdC & EQMOD Control)
Guiding: None
Camera: Unmodified Canon 500D (Digital Rebel T1i)
Mode: Raw
ISO: 800
White Balance: Custom, set on sky background
In-Camera Noise Reduction: Off
Filter: None
Date: November 06, 2010
Start Time: 00:20
Location: Beja, Portugal
Calibration: 60 Darks. 60 Flats. 60 Dark Flats.
Processing: Calibrated, aligned and stacked in DSS. Levels, curves, brightness and contrast enhancement, cropped, resampled in Photoshop. GradientXTerminator. Carboni Tools.
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