I am not a professional, just a part-time photographer. I've been doing this for 20 years, so I do have some knowledge. I have a Canon 7d mark ii camera. I recently bought a 24-70 mm lens. I have been having focusing issues with this, especially with large groups. I am still learning my 7d settings, so it's possible that it is my error. However, I have never once had issues with my 70-200mm lens. Photos from that lens are almost always in focus. It always works perfectly. The 24-70 lens seems to be really soft on the focus and it wants to focus on the background, rather than the people. This is really disappointing! I am not sure if I have a lens problem or if I need to adjust some settings on my camera? I would appreciate any advice you can give. Here is an example of what I am talking about during a recent photo shoot I did of a large group. I took about 25 of the same group. I only had about 2 that were in focus enough to even use.Thanks!