Large Magellanic Cloud
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| Date | : | 26 Jul 06 |
| Optical system | : | Canon Ultrasonic EF 24-85mm F3.5-4.5 zoom lens + unmodd Canon EOS 350D body |
| Effective F.L. & F ratio | : | 85mm @ F5.6 |
| Mount | : | Vixen GP equatorial |
| Camera setting | : | RAW format @ iso400 w/ NR off |
| Total exposure | : | 3 x 8 min |
| Guiding | : | Unguided |
| Stacking & processing | : | Stacking in DeepSkyStacker w/dark subtraction of 1 frame of 8 min, Level & Curve stretching in Photoshop 7.0.1 |
| Sky & Air conditions | : | T = 8/10 @ temp ~ -2 oC, heavy dew |
| Place of photographing | : | Coonabarabran, Australia |
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Remark |
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A test shot to see how an unmodd DSLR could do the job in wide field at temperature below zero and with very low level of light pollution @RAW format |
Comments after test :
So sad that an unmodd DSLR has very low sensitivity to H-alpha light. That resulted this LMC was lack of H-alpha data, and the looking was not so pleasing.
Personally, I prefer wide field imaging with films, especially E200s.
Wish a modd DSLR could improve it, and maybe one day, I would remove the built-in IR blocking filter for grabbing more H-alpha light, if I kept using DSLR for deep sky imaging.
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© All images are copyright William L.T. Ng.