M22 with Homemade 6" F5 Newtonian
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| Date | : | 30 Jun 06 (?) |
| Optical system | : | Homemade 6" F5 Newt + MPCC + unmodd Canon EOS 350D body |
| Effective F.L. & F ratio | : | 750 mm @ F5 |
| Mount | : | Vixen GP-DX non-goto equatorial mount |
| Camera setting | : | Jpeg format @ iso800 w/ NR on |
| Total exposure | : | 5 x 30s |
| Guiding | : | Unguided |
| Stacking & processing | : | Stacking in Registax 3.0, Level & Curve stretching in Photoshop 7.0. |
| Sky & Air conditions | : | T = 7/10 @ temp ~ 28 oC |
| Place of photographing | : | My father's home in Yuen Long, Hong Kong |
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Remark |
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A test shot to see how DSLR could do under light severely polluted sky, and this shot taken under street lights. That resulted some stray light had been reflected into camera by telescope mirrors and I didn't know how to remove it completely just by Curve stretching in PS. |
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© All images are copyright William L.T. Ng.