I do a lot of Astro photography, using a sky tracker, and have upgraded to an A68 (Lens compatibility). Th battery grip from my previous Sony no longer fits - thanks, Sony. It doesn't even have contacts inside the battery compartment, so I can't adapt it. Is there any way I can extend power for 6-7 hours of exposure plus the equivalent processing time? Either a grip or a power pack I can add to the DC port?
Thanks for for any help and suggestions
