Hi,
I currently have a canon 6d. I have the sigma art 35, canon 85 1.8, canon 24-105 f4 and canon 70-200 f2.8ii for lenses. I mainly shoot my 4 young children. I usually use my 35 inside and 70-200 outside. I need a better focusing system. I am trying to decide whether to bite the bullet and upgrade to canon 5d mark iv or selling everything and switching to Nikon D750. My lenses are holding me back a bit to switch because I love my 70-200 but I can't get over $3500 for a camera body. Is it worth it? I know I could purchase a 5d Mark iii but I don't really want to purchase a camera put out on the market the same year as my 6d so I guess my question is would you go for the new mark iv or switch over to Nikon even though that camera model is 2 years old. There are a lot of good deals going on for the Nikon d750 so it is so hard for me to decide. TIA
Dana