Highlight Tone Priority Limit

If you've enabled C.Fn II-06, Highlight tone priority, then only ISO 200-6400 will be selectable.

If you've chosen Auto, instead, then the T2i will select an appropriate ISO value for you, based on the lighting conditions and the shooting mode you're using.

■ Basic Zone modes (except Portrait). Automatic ISO settings will range between ISO 100-3200.

■ Basic Zone Portrait mode. ISO is fixed at ISO 100.

■ Creative Zone modes. Automatic ISO settings will range between ISO 100-6400. When using electronic flash, some special rules apply when using Auto mode:

■ Direct flash. When using direct flash as the main source of illumination, ISO is fixed at ISO 400.

■ Fill flash. When using direct flash to fill in shadows (as in daylight), then ISO 100 or ISO 200 will be used if the default ISO 400 setting results in overexposure. Because you want fill flash to have less of an impact on your image than when the flash is used as the main illumination, the EOS T2i is smart enough to dial down the ISO sensitivity in Auto mode.

■ Bounce flash. When an external flash is mounted on the camera and used in bounce mode, then, when using Auto ISO in some exposure modes, ISO 400-1600 will be used. The exception: if you've set the maximum Auto ISO value to ISO 400 or ISO 800, those values will be used instead. The bounce flash "rule" applies when using any Basic Zone mode except for Night Portrait, and when using the Creative Zone modes P or A-DEP

In other words, because bounce flash always cuts down the amount of light reaching your subject (compared to direct flash), the T2i in Auto ISO mode will compensate by applying higher ISO settings, as required, when bouncing flash in the shooting modes listed. Note that if you're using Tv, Av, or M Creative Zone modes, Auto ISO does not compensate automatically for bounce flash. You're probably better off setting an appropriate ISO sensitivity yourself, manually.

Here are some important cautions to keep in mind when adjusting your ISO settings:

■ Manual settings are whole stop increments. You can choose only ISO 100, 200, 400, 800, 1600, 3200, 6400, and (optionally) 12800.

■ Auto settings may use fractional-stop increments. Increments between the whole stop settings may be chosen in Auto ISO mode. That is, instead of ISO 100 or ISO 200, the camera may choose (and display) ISO 125 or ISO 160 if an in-between value is more appropriate.

■ Auto ISO setting limits. When working with automatic ISO settings, don't forget that the upper limit you select using this menu item will keep the camera from choosing a higher ISO. Also remember that, as mentioned previously, Highlight tone priority will limit auto ISO settings to the range ISO 200-6400 (or the top setting you specify here).

Playback Menu Options

Figure 3.33

The Playback menu includes options for viewing, printing, and transferring images.

The two blue-coded Playback menus are where you select options related to the display, review, transfer, and printing of the photos you've taken (see Figure 3.33). The choices you'll find include the following:

Figure 3.33

The Playback menu includes options for viewing, printing, and transferring images.

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Digital Camera and Digital Photography

Digital Camera and Digital Photography

Compared to film cameras, digital cameras are easy to use, fun and extremely versatile. Every day there’s more features being designed. Whether you have the cheapest model or a high end model, digital cameras can do an endless number of things. Let’s look at how to get the most out of your digital camera.

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