Hi, I'm looking to buy my first full frame, I currently use an old modded 600D for astrophotography. I like a full frame to still use for astro stuff but it won't be getting modified also it's going to be used for general photography especially some long exposure landscape stuff as I've been looking at the LEE stuff. I know I can't really get a camera that's going to be good for everything I want. I did have a M50 which was ok but found it too basic and not full frame so sold it. I've been looking at the 6D Mark ii or the EOS RP. I'd love to go A7iii but I'm used to Canon and cost ! Currently got the 70-200 f/4, 135 f/2 and 200 f/2.8 so I do also need a wide angle lens or two. Any suggestions ?