Flash Sync Speed and Aperture Settings

When using an EX-series Speedlite, press the built-in flash back into the camera before mounting the external flash. When using the built-in flash, keep at least 1 m 3.3 ft away from the subject. Otherwise the lens barrel may partially obstruct the flash coverage and cause part of the image to look dark. When using the built-in flash, detach any hood attahed to the lens. A lens hood will partially obstruct the flash coverage. When a super telephoto lens or fast, large-aperture lens is...