How to Use Manual Mode With Confidence

What manual mode is

A manual camera, or a camera in manual mode, lets you choose aperture, shutter speed and ISO yourself, instead of letting the camera pick some or all of them. On most cameras you select it with the mode dial or menu, where it is marked M. For the overall idea, see photography settings explained.

Manual mode does not mean manual focus. You can still use autofocus in M mode, and many people do.

Is manual mode a good idea?

Often, but not always. It helps when:

• Light is constant and you want consistent exposure from shot to shot.
• The camera’s meter is fooled, for example by a bright sky or a dark stage.
• You want to learn how settings interact.

It is less helpful when light changes quickly, such as at events or street scenes, because you may miss shots while adjusting. Aperture priority or shutter priority, with exposure compensation, can be quicker. Many photographers switch between modes by situation, so manual is a tool, not a badge.

Before you start

1. Focus: Choose autofocus or manual focus on the lens or camera.
2. White balance: Leave on auto, or set it for the light. See photography settings explained.
3. Metering mode: Evaluative (matrix) metering is a reasonable default (see camera metering modes). Spot metering reads only a small area.
4. File format: RAW gives more room to correct exposure later.

Step-by-step method

1. Turn the mode dial to M.
2. Choose the aperture for the look you want. A wide aperture (small f-number) gives a softer background and more light; a narrow one gives more depth of field.
3. Choose the shutter speed for the movement. Use a speed fast enough to avoid shake or freeze your subject. The shutter speed chart can help.
4. Set ISO as low as practical. In dim light, raise it until the exposure works.
5. Read the meter (see below) and adjust until it is near the centre.
6. Take a test shot, check the screen and histogram, and refine.

Reading the exposure meter

In M mode the camera still measures the light and shows a scale in the viewfinder or screen, typically running from minus to plus with a zero in the middle. Zero means the camera thinks the exposure matches its own idea of correct. Left of zero is darker, right of zero is brighter.

The meter is a guide, not a verdict. If you are shooting snow, the meter may suggest a darker result than you want; for a dark scene, it may push brighter. Move the settings to suit the scene, and use the histogram. What exposure means explains how to judge results.

A worked example

You are photographing a friend outdoors in the shade and want a soft background.

1. Set the aperture to f/2.8 (or the widest your lens offers).
2. Set the shutter speed to 1/250 so small movements are sharp.
3. Set ISO 200 and check the meter. It shows two stops dark.
4. Options: raise ISO to 800 (two stops), or slow the shutter to 1/60, or open the aperture further. Choose ISO 800 because you want to keep the shutter fast.
5. Take the shot, check the histogram, and adjust a little if needed.

These numbers are only an illustration. Your scene may need different values.

Manual with auto ISO

A popular hybrid is manual mode with auto ISO. You set aperture and shutter speed directly, and the camera adjusts ISO to keep the exposure sensible. If your camera offers exposure compensation in this setup, you can still make the image brighter or darker. It is useful when light changes but you want fixed aperture and shutter speed. Set an upper ISO limit to control noise; see ISO vs gain for why.

Manual controls on an iPhone

The built-in camera app on an iPhone does not have a full manual mode with separate aperture, shutter and ISO controls, though it offers tools such as an exposure slider, tap-to-focus and lock, and some models offer other controls in settings. For manual shutter speed and ISO, many people use a third-party camera app. Features differ by model and software version, so check what your phone offers. Phone lenses usually have a fixed aperture.

Troubleshooting

• Photos are too dark: Open the aperture, slow the shutter, or raise ISO.
• Photos are too bright: Do the opposite, and check for blown highlights.
• Blurry images: Check shutter speed first. If the subject moves, speed it up; if the camera moves, speed up or use a tripod.
• Background not soft enough: Use a wider aperture, a longer focal length, or move closer to the subject; the blurry background guide has more.
• Too noisy: Lower ISO and compensate with aperture or shutter speed, or add light.

If you are not sure which mode to try first on a Canon camera, read the Canon mode dial explainer.