Messier M13
Photo Information
- Wide field M13 image
- Messier M13 globular cluster in center
- Image scale: 0° 55' x 0° 38', north is top, west is right
- Image size: one fourth D70 resolution
- Faintest stars: about 14 magnitude
- Seeing: Antoniadi scale 3, moderate seeing, with larger air termors
- Three images stacked DSC_1354.JPG, DSC_1356.JPG and DSC_1357.JPG
- Each image is about 60 seconds exposure
- DSC_1354.JPG image information
- Nikon D70
- 2004/07/04 01:29:09.2
- RAW (12-bit) Lossless
- Image Size: Large (3008 x 2000)
- Lens: Argonaut™ 150mm Maksutov-Cassegrain telescope
- Focal Length: 0mm
- Exposure Mode: Manual
- Metering Mode: Center-Weighted
- 62.50 sec - F/0
- Exposure Comp.: 0 EV
- Sensitivity: ISO 1600
- Optimize Image: Normal
- White Balance: Auto
- AF Mode: Manual
- Flash Sync Mode: Not Attached
- Color Mode: Mode Ia (sRGB)
- Tone Comp: Auto
- Hue Adjustment: 0°
- Saturation: Normal
- Sharpening: Auto
- Image Comment:
- Noise Reduction: Fixed Pattern
Imaging Equipment
- Camera: Nikon D70
- Telescope: Orion Argonaut™ 150mm Maksutov-Cassegrain telescope,
f/12 focal ratio, 1800mm focal length
- Focal Reducer/Corrector (1800mm to 1440mm, f/12 to f/9.6)
- Telescope Mount: Losmandy G-11
- No guiding
Imaging Processing
- Nikon Capture 4.1: RAW, Curves, DDE at 20 and save as 16 bit TIF.
- Cyanogen Productions, Inc. MaxIm DL CCD software: align, stack and DDP.
- Adobe Photoshop Version CS: levels, unsharp mask, resize and save as JPG.
© 1998-2004 David Haworth
