The Canon R5 Mark II, with its 45MP resolution, is more than capable of amazing astrophotography. (Image credit: Canon) Walmart has dropped the Canon EOS R5 Mark II camera to its lowest-ever price in this incredible Canon camera deal for astrophotographers. It's available for $3,398, reduced by $501 from its usual $3,899 MSRP. In our Canon EOS R5 Mark II review , our expert tester James Abbott awarded it 4.5 stars out of 5-star score. James rated the R5 Mark II as a high-tech camera capable of capturing any subject (though the night sky is our favorite), thanks to its incredible 45MP sensor and excellent high ISO handling. Paul Brett is a deals writer at Space, Live Science, and across the Sports and Knowledge titles at Future. Paul is an award-winning photographer, having won the Mountain Photographer of the Year title at Trail Magazine. A huge fan of photography and cameras, he can be found on top of Scotland's mountains, wild camping, waiting to capture the Northern Lights or a cloud inversion.…