If you have been using digital cam most probably shall be used to live view. It helps a lot without having to rely on checking the exposure meter in the viewfinder to acertain if you get the desired exposure. If you do get older dslr models without live view you have to get familiar and get to the sweet spot for each and every differnt type of lenses you may mount on the cam. Its a challenge if you look at it the positive way, a challenge to shoot just like a 'blind' skilled swordsman.
i trusted the live histogram on the EVF a lot when i first bought my camera...but it always disappoint me and i never used that after using it for a few month..turn it off as it is not "ZUN" at all....rely on my instinct is more "ZUN"..