Good morning I have a Nikon D5500 and it's a good camera. When using the sigma 17-70 lens I'm finding that to get really sharp shots I have to use the macro mode which is infuriating! For example when out shooting the kids at a party or whatnot I've used A mode with f4 or so, ISO around 100-200 and a flash gun but the image comes out a touch soft. Shoot the same in macro mode and the image is crystal clear.Is this a quirk