Using a 50mm lens with f/1 native aperture for portraits
Some of our students have purchased some of the very fast 50mm lenses with native apertures in the f/1 range. These lenses are great for low light situations where you need higher shutter speeds to be able to hand hold the camera. When combined with a higher ISO you can shoot handheld in some very low lighting situations.
Many of those students have been disappointed with their Depth of Field (DOF) results when shooting close up images with these lenses at f/1 to f/2. Particularly head shot portraits where the person’s head and shoulders fill the frame. They were hoping to get backgrounds that were unrecognizable and completely blurred out while their subject was in focus.