M42 with Vixen R200SS
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| Date | : | 28 Dec 06 |
| Optical system | : | Vixen R200SS + MPCC + unmodd Canon EOS 350D body |
| Effective F.L. & F ratio | : | 800 mm @ F4 |
| Mount | : | Vixen old version ATLUX non-goto equatorial mount |
| Camera setting | : | Jpeg format @ iso800 w/ NR on |
| Total exposure | : | 6 x 60s + 10 x 45s = 810 s |
| Guiding | : | Unguided |
| Stacking & processing | : | Stacking in Registax 3.0, Level & Curve stretching in Photoshop 7.0. |
| Sky & Air conditions | : | T = 5-6/10 @ temp ~ 12 oC, R.H. ~ 96% |
| Place of photographing | : | PTC coach carpark in Sai Kung, Hong Kong |
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Remark |
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A test shot to see how much detail could be captured under a light polluted sky at longer focal length w/o any LPS filter |
Comments after test :
When being shot, M42 had moved in the very severely light polluted region in the low western sky. So, didn't give too much expectation on the final quality. Just wanted to get any information as mentioned in "Remark" above.
Very surprised, MPCC "eats" the coma quite much on this F4 optics. If you couldn't afford those very high priced fast astrographs, this combination of "Vixen R200SS + MPCC" would be a good choice for sure.
I believe I can take much better images with this scope next time in help with a LPS filter and camera set at RAW mode @ISO400 speed.
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© All images are copyright William L.T. Ng.