Hi, Well first let me clarify that Aperture here refers to the camera aperture and not Apple Aperture software. Okay, I have been wondering, a low aperture number (f/2.8) will be able to get faster shutter speed but then it will make the background become blur right? This is good for portraits and such, but I wonder, in low light, it is also recommended to use a low aperture number (especially those f/2 and smaller) but wont a lower aperture number make the image more blur (means that the only a small part of the subject will be sharp)? Cause I remember that it states to get the whole image to be sharp (for landscape esp.) you need to increase the aperture number but you cant do that in low light right?