If you use a Digital SLR camera they often have an exposure lock button on the back that lets you lock exposure.
EXPOSURE LOCK BUTTON ON BACK OF CAMERA
Many digital SLR and mirrorless cameras have a Focus and Exposure lock on the back of the camera. The button usually says AEL, AE/AF or with Canon it has an Asterix. You can set this in the menu to just lock exposure.
- Some of the buttons say AEL and are only for Auto Exposure Lock, some say AE/AF and you will need to go into your menu to set the back button for exposure lock only.
- You want to go into your digital cameras menu and set the Exposure lock button to only lock the exposure, not the focus.
- On some cameras you must also set the picture taking button to only lock the focus
Basically we are splitting the two settings with the exposure being locked when the exposure lock button is held down and the focus being locked when the picture taking button is held down.
BRIGHT SKY OR BACKLIT SUBJECT
If you are photographing a mountain and the sky fools the meter so the mountain is too dark you can zoom in on the mountain, hold down the exposure lock button on the back of the camera and then zoom back, focus on the subject, compose and take the photo.
This will lock the exposure for the mountain. You can also use this when photographing people that are backlit with a bright background behind them. Zoom in so they fill the frame, hold down the exposure lock button and then zoom back out and take the picture.
Camera lenses are made so you can’t zoom in and lock the focus and zoom out without messing up the focus.
- Zoom in and hold down Exposure lock button on back of camera\
- Zoom back out to take photo while keeping the exposure lock button held down, focus, compose and take the picture.
AIM AT SHADE IF SUBJECT IN SHADE
If you are standing in the shade and you can also aim the camera at an area in the shade to set the exposure if your subject is also in the shade. Aiming the camera at something that is kind of a middle tone will give you a better exposure than aiming it at something black or white.
It is a quick easy way to handle the exposure when the cameras light meter gets fooled by a bright area and your subject is in the shade.
(Some cameras also have a Function button on the front of the body that you can program to control different settings.)