Canon EOS 5DS, Instruction Manual

Page: 406 / 534

3
Custom Function Settings
N
406
Same exposure for new aperture
If the <
a
> mode (manual exposure shooting) is set and the ISO
speed is set manually (other than Auto ISO or H (12800) is set), the
maximum aperture’s f/number may change to a higher number
(smaller aperture) if you do any of the following: 1. Change the lens, 2.
Attach or detach an Extender, or 3. Use a zoom lens whose maximum
aperture f/number changes. If you then shoot at the exposure setting
as is, the image will be underexposed by the amount the maximum
aperture f/number changes to a higher number. However, by changing
the ISO speed or shutter speed (Tv) automatically, you can obtain the
same exposure that would be obtained before you did 1, 2, or 3.
OFF: Disable
Automatic changes in settings to maintain the specified exposure
will not be applied. The ISO speed, shutter speed, and aperture
already set will be used for shooting. If you do 1, 2, or 3 and the
maximum aperture f/number increases, adjust the ISO speed and
shutter speed before you shoot.
ISO: ISO speed
If you do 1, 2, or 3, the ISO speed will automatically increase to
compensate for the amount that the maximum aperture f/number
increases by. The same exposure that would be obtained before
you did 1, 2, or 3 is thereby obtained.
Tv: Shutter speed
If you do 1, 2, or 3, a slower shutter speed will automatically be set
to compensate for the amount that the maximum aperture
f/number increases by. The same exposure that would be
obtained before you did 1, 2, or 3 is thereby obtained.