Canon 7DMKII vs Canon 5D MKIV - Image quality

[Photog82]

I think the hardest thing for me to get my mind around is this. I use the Canon 35 1.4 II for many of my portraits as well as the Canon 24-105 L. I realize that with the 35 it's basically a 50; but, if I put that on a FF, will I just need to get closer to my subject than I normally do to get the same effect? I have never used a FF so I just don't know what to expect.

Not sure if it would help, but I am normally 4-5' away in this type of photo.

[Kayaker72]

I think the hardest thing for me to get my mind around is this. I use the Canon 35 1.4 II for many of my portraits as well as the Canon 24-105 L. I realize that with the 35 it's basically a 50; but, if I put that on a FF, will I just need to get closer to my subject than I normally do to get the same effect?

Yes.

Say your composition is 4 ft wide and 6 ft high, with the 35 mm on a crop sensor you would stand ~6.2 ft away. With a 35 mm on a FF sensor you would need to stand ~3.9 ft away. Basically, with a cropped sensor, you will be standing 1.6x the distance further away than FF sensor to get the same composition/framing. Of course, other factors (perspective, bokeh, etc) will be different.