Coverage. Canon rates the EOS 70D's internal flash coverage at approximately 17mm, though as you can see in the top left shot taken at 18mm, we've found manufacturers' coverage ratings are usually ...

*Note: Buffer clearing times measured with a SanDisk Extreme Pro 95MB/s UHS-I SDHC card. Slower cards will produce correspondingly slower clearing times. Slow cards may also limit length of bursts ...