Limiting light emission from the camera

If you observe with other people, or if you want to preserve your night vision, a DSLR can be annoying. The bright LCD display lights up at the end of every picture, and on some models it glows all the time.

Fortunately, there are menu settings to change this. You can turn "review" off so that the picture isn't displayed automatically at the end of each exposure. (Press > or "Play" when you want to see it.) And you can set cameras such as the Canon XTi (400D) so that the LCD does not display settings until you press a button to turn it on.

That leaves the indicator LEDs. In general, red LEDs aren't bothersome; you can stick a piece of tape on top of green ones, such as the power-on LED on top of the Digital Rebel XTi (400D) (Figure 3.6).

To further protect your night vision, you can put deep red plastic over the LCD display. A convenient material for this purpose is Rubylith, a graphic arts masking material consisting of deep-red plastic on a transparent plastic base. If you peel the Rubylith off its base, it will stick to the LCD screen and you can easily peel it off later. Or you can leave it on its backing and secure it in some other way. Because it is designed to work with photographic materials, Rubylith is guaranteed to block short-wavelength light, so it's especially good for preserving dark adaptation. Many drafting-supply stores sell Rubylith by the square foot; one online vendor is

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