The 3:2 ratio is the "native" ratio because that is what is give based on the sensors dimensions. When a camera offers other aspect ratios, it's simply using the native ratio of 3:2 and then cropping that picture to another ratio "in camera". It's only doing this to the jpg image files produced by the camera. It's not affecting the raw images. As far as professional publications go, they usually want the full 3:2 native picture and then their editing department will crop them to fit the piece (page or cover). So it's best to let them make it fit.
Lugano wrote:
hello everybody,
My Canon 6d offers several aspect ratios: 3:2 4:3 16:9 and 1:1
So far I had been shooting only in 3:2 ratio
Now, I would like to learn what each ratio implies and if magazine photo editors prefer one ratio to another and why.
I know that I can get some of this information in internet, but I am more interested in practical results based on experiences.
I hope this question makes sense,
Thank you very much