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Canon 400mm F2.8 super telephoto with full spectrum Canon 60D on Sky Watcher EQ6-mount. Rig is for continuous shooting with 30 sec subs, no guding and no dithering. I'm relying on bitter cold winter temperatures in New England and a heat reduction modification done to the camera. I'll change the rig in the warmer months to allow time for cooldown between exposures and to introduce dithering, if not guiding. I've found that in my light polluted skies, 30 sec to 1 minute subs are usually maximally useful to me. Longer subs tend to overexpose unless a clip in filter is used.

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