Camera Comparison: Canon 50Dh / 60Da
| Object |
Camera comparison using The Witch's Broom Nebula (NGC6992), in Cygnus; Top: Canon 50Dh DSLR (Hutech Modified) Bottom: Canon 60Da DSLR |
|
| Telescope (Photo) | Celestron 11" EdgeHD SCT OTA w/ Celestron EdgeHD 0.7 Focal Reducer on Losmandy G11 Mount | |
| Telescope (Guiding) |
Top: Orion EON 80mm ED Refractor @ f/12.5 (f/6.25 w/2x Powermate) on
Losmandy G11 Mount Bottom: Orion EON 80mm ED Refractor @ f/6.25 on Losmandy G11 Mount |
|
| Camera (Photo) |
Top: Canon 50Dh DSLR (Hutech Modified) Bottom: Canon 60Da DSLR |
|
| Camera (Guiding) |
Top: Meade DSI Pro III w/
PHD Guiding Bottom: SBIG ST-i w/ PHD Guiding |
|
| Exposure Detail | Excluded-average combination of 20 images (top) and 21 images (bottom) at 300 seconds each (captured using ImagesPlus 4.50), full calibration (bias, dark, flat, flat-dark), and initial image processing using ImagesPlus 4.50A; final image processing using Photoshop CS5.1; both images processed with identical processing steps and values. | |
| Location | Cincinnati Astronomical Society's Dark-Sky Site (Adams County, Ohio) (N38.876, W83.464) | |
| Date |
Top: 06/15/12 Bottom: 06/22/12 |
|
| Comments |
First light with new Canon 60Da astrophotography DSLR camera.
Comparison with same object taken 1 week earlier under very
similar conditions, using identical imaging equipment except for
imaging camera. Canon 50D camera was modified after
purchase by Hutech to replace filter to pass much more red than
unmodified camera. Canon 60Da was factory-modified to pass
3x more red than unmodified camera. Image sizes are
different due to slightly different pixel density (15mp for
50Dh, 18mp for 60Da). Above images taken through new Celestron EdgeHD 0.7
focal reducer. Also used Optec TCF-Si
temperature-controlled focuser. Both images cropped only by a
few pixels at right and top, to remove dithering effects. |