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I’m coming to astronomy/astrophotography from a wildlife photography background but as a parent of two young children my time during daylight hours is going to be limited for the next decade! I have a Canon 6D (full frame), Canon 650D (APS-C) and some decent L lenses (400mm f5.6 L, 70-200mm f2.8 L IS II plus the 24-105 f4 IS kit lens). So my question is, does it make sense to buy something like the Skywatcher HEQ5 Pro to start with (with perhaps a modestly priced scope for visual observation) and stick to my photography kit for imaging? If I invest in a good astro equatorial mount which I can add a telescope of some variety to, can I directly mount my 400mm f5.6 Canon L lens and take galaxy/nebula images? Is there some big difference between the Wildlife lenses and the refractor telescopes of similar focal length? I assume I would be looking at taking relatively short exposures with that set-up as I wouldn’t have the benefit of autoguiding…? Thanks in advance for your advice.