Debating between a H4d-40 or 50, but what lens for landscapes & nature? I have a 5D Mark ii now.
You will be happy with either one of those cameras. With regards to the lenses, it depends on how you see your subject. If you like getting up close to the landscape, get the 28mm or 35mm. If you work in the middle, get the new or old zoom. You should rent some of the lenses to determine which is best for you before purchasing. Good luck!
Kind regards,
Derek