The Canon G9X-II pocket camera has three astrophotography modes: "Star Portrait", "Star Landscape", and "Star Trails". In the previous post an example of the "Star Trails" mode was shown. This post will show results from the "Star Landscape" mode. This mode has more user-adjustable parameters. The ISO was set to 800 and the exposure was 15 sec at f/2. The camera was mounted on a Vixen Polarie star tracker.
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Star Landscape: Orion, the Winter Triangle, and Jupiter.
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The "Winter Triangle" asterism comprises Sirius (lower left), Procyon (upper left), and Betelgeuse (center). Jupiter is the bright star at right center edge.
The G9X offers three options for star processing: Sharp, Off, and Soft. The above image was obtained using the "Soft" setting. This mimics the effect of a diffusion filter and is supposed to give a better representation of relative star brightness.
The next three images show the effect of the three settings:
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"Sharp" setting
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| "Off" |
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| "Soft" |
There is some astigmatism visible around the edges at f/2, but no worse than many lenses used on interchangable-lens cameras.
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Sirius ("Sharp" setting)
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Sirius ("Soft" setting)
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