The Rebel T2i's built-in flash has a guide number rating of 43 feet (13 meters) at ISO 100, translating to a range of about 12 feet at ISO 100 with the kit lens at wide-angle (at f/3.5) and about ...
Coverage. Canon rates the EOS Rebel T3's internal flash coverage at approximately 17mm, though as you can see in the top left shot, we've found manufacturers' coverage ratings are usually quite ...
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