Canon 80D Experience Manual page 18

Canon 80D Experience
Distortion Correction is used to automatically correct barrel or pincushion distortion (the
apparent curving of an image) caused by a wide angle or a telephoto lens. Barrel
distortion is a curving outward of horizontal and vertical lines, usually increasing toward
the edges of the frame, and is typically caused by wide angle zoom lenses. Pincushion
distortion is a curving inward of horizontal and vertical lines, usually increasing toward
the edges of the frame, and can be caused by telephoto zoom lenses. Enabling this
feature may slow down image recording and decrease the burst rate, so you won't want
to use it during continuous shooting such as for sports or action situations.
You may wish to use this correction with your Canon lenses that exhibit distortion, but if
you do not want the camera doing this without any of your control, you can disable this
and correct distortion in post-processing. Adobe Camera RAW, Photoshop, and
Lightroom contain specific lens profiles to use in correcting for these types of issues.
I suggest you set each of these for Disable unless you have a specific issue with
vignetting, chromatic aberration, and/ or distortion when using a particular lens. Then
decide if you want the camera to deal with this or if you wish to address it in post-
processing. Maybe put this item in My Menu to quickly access it if you sometimes need
it with specific lenses (more about My Menu later in this chapter). Also, set for Disable
when using non-Canon lenses. While you cannot apply these corrections to JPEG
images that have already been captured, you can process RAW images in-camera to
apply these settings after the image has been taken, as will be explained with the RAW
Image Processing item in the Playback 1 menu.
Figure 36 - Left: Flash Control menu, for built-in, wireless, and external flash settings.
Right: The "Flash sync. Speed in Av mode" options.
Flash Control
These settings allow you to set the options for the built-in flash, as well as for an
external flash if you have an optional Canon EX Speedlite attached and turned on (see
Figure 36 - left). Some of the basic settings will be explained here, and then flash
settings and flash use are further discussed in the Flash chapter of the text, including
external flash and wireless flash use.
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