- As you're working to establish…your overall exposure settings,…naturally that's going to include your aperture setting,…which is a key component in calculating depth of field,…and obviously in the process making sure…that you're in tack sharp focus for your key subject,…it's important to keep in mind…some of the limitations of focus.…Of course, we already understand…if we've been calculating our depth of field…or considering the overall settings for our composition…that depth of field represents a limit in terms of focus.…In other words, how much of our key subject…can we actually get in focus?…If we're using a relatively long lens…and focusing very close on our subject,…stopping down the lens might help,…but we may end up still…with a relatively narrow depth of field.…
And so we might want to change our settings,…change to a wider focal length, a shorter focal length lens,…so that we can get more depth of field,…maybe moving away from the subject.…But when we're focusing relatively close…we have another limitation to think about…
Photographer and educator Tim Grey explores these questions and more in this exploration of focus and autofocus. And because sharpness isn't everything, Tim also details scenarios where blur can have more impact.
- What is focus?
- Calculating depth of field
- Looking at focus limitations
- Employing autofocus one shot vs. continuous
- Using manual focus
- Setting and choosing focus points
- Controlling depth of field
- Using intentional blur and bokeh
- Finding focus while panning