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AEL/AFL button, (32, 49, 98), This button can set to either lock exposure or focus when pushed. (I'm a
left eyed shooter so this button is too close to the viewfinder and I have to move my face away from the
viewfinder to use it)
Arrow Pad, (31), Moves the cursor or selections in the direction you choose, and is also used to move
the AF target position on most modes - used in conjunction with the Info button makes all AF options
available)
And then there are the buttons on the battery grip as well as a button on some lenses that can be
reconfigured.
So if I want to assign other functions:
the Fn1 button is a candidate since all default functions are accessible through the arrow keys.
the Fn2 button is something I very seldom use so it is a candidate for reassignment
the One Touch WB is nice but since I normally used the generalized WB settings, I do not set a
customized WB all that often, and I can easily use one of the 4 custom WB options to set a
customized white balance, this button is also a possible candidate for reassignment but further
down on my customization priority list.
the Preview button is a likely candidate as well.
the AEL/AFL button will not get used no matter what I use it for, unless I intend to use it while
not looking through the viewfinder. (located on the back of the camera by the viewfinder)
The arrow pad is locked in - I'm not changing it.
Back Button focus.
This allows me to set up one button that allows to me to use the best of S-AF and C-AF without having to
switch between the two focusing modes. And if I hand my camera off to someone else, I just set S-AF
and they won't have any issues!
This requires me to put the camera in C-AF mode, change C-AF to Mode 4, (Custom Menu/gears, Menu
AF/MF, AEL/AFL, C-AF, to Mode 4) which makes the AEL/AFL button the button for focusing and not the
shutter button! This setup also requires that I have release priority set for C-AF. Custom Menu (gears),
Menu C Release, Rls Prioirty C - On.
Image Stabilization - I also have Image stabilization so that it turns on when the shutter button is
pressed halfway, Custom Menu C, Release, Half Way RLS with IS, On.
With back button focusing I can shoot C-AF just by pressing the AEL/AFL button and following my subject
while pressing the shutter button to take the shot when I want, or I can release the button at any time
focus is locked, recompose, then press the shutter button. Repeat as required! It takes a while to get
used to but is excellent.
Oh, but wait. I stated earlier that the AEL/AFL was a problem for me to use. Let's see…