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Extender ÜBSEU!

25 / 40*^® EF50mm f/1.8 II lens attached lo the camera has been added.

Extender ÜBSEU!

25 / 40*^® EF50mm f/1.8 II lens attached lo the camera has been added.

Select the lenses to be corrected.

5. Select the category containing the lens you want to register from the panels at the top of the new screen, then place a check mark next to all the lenses you'd like to register in the camera.

6. Click OK to send the data from your computer to the T2i and register your lenses.

7. When a newly registered lens is mounted on the camera, you will be able to activate the anti-vignetting feature for that lens from the Shooting 1 menu.

Red-Eye Reduction

Your Rebel T2i has a fairly effective red-eye reduction flash mode. Unfortunately, your camera is unable, on its own, to eliminate the red-eye effects that occur when an electronic flash (or, rarely, illumination from other sources) bounces off the retinas of the eye and into the camera lens. Animals seem to suffer from yellow or green glowing pupils, instead; the effect is equally undesirable. The effect is worst under low-light conditions (exactly when you might be using a flash) as the pupils expand to allow more light to reach the retinas. The best you can hope for is to reduce or minimize the red-eye effect.

The best way to truly eliminate red-eye is to raise the flash up off the camera so its illumination approaches the eye from an angle that won't reflect directly back to the retina and into the lens. The extra height of the built-in flash may not be sufficient, however. Gaining a bit of extra height alone may be a good reason for using an external flash. If you're working with your T2i's built-in flash, your only recourse may be to switch the Redeye reduction feature menu choice shown in Figure 3.10. It causes a lamp on the front of the camera to illuminate with a half-press of the shutter release button, which may cause your subjects' pupils to contract, decreasing the amount of the red-eye effect. You may have to ask your subject to look at the lamp to gain maximum effect. Avoid blocking the lamp as your fingers wrap around the grip. Figure 3.11 shows the effects of wider pupils (left) and those that have been contracted using the T2i's red-eye reduction feature.

Figure 3.10

Turn on your camera's redeye reduction feature to help eliminate demon-red pupils.

Figure 3.11

Red-eye is tamed (right), thanks to the Rebel T2i's redeye reduction lamp.

Figure 3.10

Turn on your camera's redeye reduction feature to help eliminate demon-red pupils.

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