Exposure compensation and flash ratio of 1:8 to 8:1 can be set on a per-group bases, allowing a lot of control over how multiples flashes contribute to the final exposure. Like that of the 60D, the Canon T3i's wireless flash capability supports four channels and defines two groups (the 7D defines three groups). You can have the built-in flash contribute to the exposure, or just command the remote flashes. That is, the T3i's built-in flash can act as a controller or commander to one or more remote wireless flashes. The EOS 7D and 60D were the first Canon SLRs to support wireless flash control using the built-in flash, and the Canon T3i follows suit. Maximum flash x-sync speed is 1/200-second. Like most consumer SLRs, the Canon T3i offers no PC-Sync connector for triggering studio strobes, etc. A Flash Exposure Compensation feature controls the flash exposure +/- 2 stops in 1/2 or 1/3-stop increments.Īs you'd expect, there is a dedicated flash hot-shoe on the Canon T3i's pentamirror housing, for use with external flash units. This struck us as very handy, akin to the more conventional autoexposure lock function for handling difficult ambient lighting conditions. (TTL refers to "Through The Lens" metering.) Both evaluatative and average E-TTL II metering modes are available, and the flash can be timed to fire immediately after the first curtain opens, or right before the second curtain closes, allowing for motion trails that lead or follow the subject position at the moment the flash fires.Īnother nice touch is the Canon T3i's Flash Exposure Lock function, which fires the flash under manual control before the actual exposure, to determine the proper exposure setting. The Rebel T3i also uses E-TTL II control for both the built-in and compatible external flashes, a standard that promises and seems to deliver better, more balanced exposures. This makes it easy to balance flash and ambient lighting for more natural-looking pictures. The Canon T3i gives you a lot of control over flash exposure, allowing you to adjust flash and ambient exposure independently of each other, in one-half or one-third EV increments.
CANON EOS REBEL T3I MANUAL SETTINGS ISO
The Rebel T3i'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 either kit lens at wide-angle (at f/3.5) and about 7.5 feet at telephoto (at f/5.6).
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