SIGMA fp for Still Photography: First Impressions » Sigma fp blog photos_0019
ISO 800; f1.8 at 8 sec. Sigma 35mm f1.2 L mount lens- I think the Sigma fp is going to be an ideal tool for astro photography. It has the ability to handle high ISO with little noise and the built-in intervalometer will make time lapse easy. For longer projects, the battery in the fp can be replaced with an AC adapter, which will plug into an all-purpose battery I use for long time lapse projects.