Custom / Personal functions
The EOS-1D is probably the most configurable and flexible D-SLR to date, with no less than 21 custom functions and 28 personal functions. Custom and personal functions can be 'registered' into one of three 'custom function groups', the idea being that you can instantly switch between different sets of custom / personal functions for different situations or photographers.
![]() |
![]() |
All 21 EOS-1D custom function screens on one viewable contact sheet | All 21 EOS-1D custom function screens on one printable contact sheet |
Custom functions are controlled through the camera menu system, personal functions are set via the supplied TWAIN software and an IEEE 1394 (Firewire) connection.
Custom Functions
C.Fn | Description | Options |
01 | Finder display during exposure Controls if exposure information and remaining buffer space is displayed during continuous shooting. |
0 - No viewfinder display 1 - Finder display on |
02 | Shutter release without CF card Disable the shutter button if there is no CF card inserted |
0 - Possible without
CF card 1 - Not possible |
03 | ISO speed expansion Provides access to ISO 100 or 3200 (indicated as L or H respectively) |
0 - Standard ISO 1 - Expanded sensitivity |
04 | Shutter button / AE lock button Controls the function of the shutter release and AE lock buttons |
0 - AF / AE lock 1 - AE lock / AF 2 - AF / AF Lock, no AE lock 3 - AE / AF, no AE lock |
05 | Manual TV/AV set for M exposure Select which controls set either shutter speed or aperture in manual exposure mode. Also changes the way auto bracketing is executed. |
0 - Tv = main, Av =
quick 1 - Tv= quick, Av = main 2 - Tv= main, Av = quick w/o lens 3 - Tv = quick, Av = main w/o lens |
06 | Exposure level increments Select either third, half or full stop increments for shutter speed, aperture and exposure compensation |
0 - 1/3-stop set, 1/3-stop
compen. 1 - 1-stop set, 1/3-stop compen. 2 - 1/2-stop set, 1/2-stop compen. |
07 | USM lens electronic MF Allows you to control manual focusing on certain USM lenses |
0 - Turns on after
one-shot AF 1 - Turns off after one-shot AF 2 - Always turned off |
08 | Top LCD panel / Back LCD panel Controls what information is displayed on the top and back LCD panels |
0 - Remaining shots
/ File number 1 - ISO / Remaining shots 2 - ISO / File number 3 - Shots in folder / Remaining shots |
09 | Auto bracketing sequence / cancel Alter the AEB sequence. If Auto cancellation is selected bracketing will be cancelled if lens is changed or camera is powered off |
0 - 0,-,+ / Auto cancellation 1 - 0,-,+ / No cancellation 2 - -,0,+ / Auto cancellation 3 - -,0,+ / No cancellation |
10 | AF point illumination Controls the way the AF points are superimposed on the viewfinder focus screen |
0 - On 1 - Off 2 - On without dimming 3 - Brighter |
11 | AF point selection method Set the button / dial control combinations used to select AF points |
0 - AF point + main
/ quick dial 1 - Exp. compen + main / quick dial 2 - Assist + main / quick dial alone 3 - FEL button + main / quick dial |
12 | Mirror lockup Lock mirror up before main exposure, used to reduce vibration for long telephoto or macro shots. When enabled two presses of shutter release are required |
0 - Disable 1 - Enable |
13 | Number of AF points / Spot metering Set the number of selectable AF points and if spot metering follows the active AF point or is locked at the center of the viewfinder |
0 - 45 / Center AF
point 1 - 11 / Active AF point 2 - 11 / Center AF point 3 - 9 / Active AF point |
14 | Auto reduction of fill flash Automatically reduces flash power in daylight to produce natural fill-flash |
0 - Enable 1 - Disable |
15 | Shutter curtain synchronization Allows you to control where in the exposure the flash fires in a slow sync flash shot |
0 - 1st-curtain sync 1 - 2nd-curtain sync |
16 | Safety shift in Av or Tv If a subjects brightness suddenly changes and the current Av or Tv setting is unsuitable the camera will automatically change the setting to obtain a correct exposure |
0 - Disable 1 - Enable |
17 | AF point activation area Expands the active AF point either by one point or two points around the selected AF point |
0 - Single AF point 1 - Expand 7 AF points 2 - Automatic expand (max 13 AF points) |
18 | Switch to registered AF point Defines what button combination must be pressed to return the AF point to a previously registered AF point |
0 - Assist + AF point
button 1 - Assist button 2 - Only while pressing Assist button |
19 | Lens AF stop button function Controls the function of the AF button on certain AF lenses |
0 - AF stop 1 - AF start 2 - AE lock while metering 3 - AF point, MF - Auto, AF - Center 4 - AF mode: one shot <> AI servo 5 - IS start |
20 | AI servo tracking sensitivity Sets the AI servo tracking speed, setting to slow can prevent it from being thrown off by obstructions passing between the camera and the subject |
0 - Standard 1 - Slow 2 - Moderately slow 3 - Moderately fast 4 - Fast |
00 | Focusing Screen | 0 - Ec-N,R 1 - EC-A,B,C,CII,CIII,D,H,I,L (default) |
Personal Functions
![]() |
![]() |
All 24 EOS-1D personal function screens on one viewable contact sheet | All 24 EOS-1D personal function screens on one printable contact sheet |
The functions below can only be set through the TWAIN software and an IEEE 1394 (Firewire) connection, captures of the dialog used to change these settings can be found later in the review.
P.Fn | Description | Options |
01 | Disable shooting modes Allows you to disable any combination of the modes shown here * |
Disable program AE Disable shutter-priority AE Disable aperture-priority AE Disable depth-of-field AE Disable bulb exposure Disable manual exposure |
02 | Disable metering modes Allows you to disable any combination of metering modes shown here * |
Disable evaluative
metering Disable partial metering Disable spot metering Disable center-weighted average metering |
03 | Specify metering mode for manual exposure | Evaluative Partial metering Spot metering Center-weighted average metering |
04 | Set maximum and minimum shutter speeds | Maximum - any up to
1/16000 sec Minimum - any down to 30 sec |
05 | Set maximum and minimum apertures | Maximum - any down
to F91 Minimum - any up to F1 |
06 | Registers and switches the shooting and metering mode | Off On |
07 | Repeats bracketing during continuous shooting | Off On |
08 | Set number of shots to be bracketed | 2 3 5 7 |
09 | Change the bracketing sequence for C.Fn 9 2/3 to increased, standard, decreased | Off On |
10 | Retains the shift amount for program shift | Off On |
13 | Executes AI servo AF continuous shooting giving priority to the drive speed | Off On |
14 | Disables focus detection (search driving) by the lens drive | Off On |
15 | Disables the AF-assist beam from being emitted (by connected flash) | Off On |
16 | Enables automatic shooting when focus is achieved at the fixed point of focus when the shutter button is pressed fully | Off On |
17 | Disables automatic AF point selection | Off On |
18 | Enables automatic AF point selection when C.Fn 11-2 has been set | Off On |
19 | Sets continuous shooting speed | High-speed - 4, 5,
6, 7, 8 fps Low speed - 3, 2, 1 fps |
20 | Limits number of shots during continuous shooting | Numeric |
21 | Enables silent operation when the shutter button is OFF after picture taking | Off On |
23 | Change timers length * | 10 sec 2 sec |
24 | Illuminate the LCD panels during Bulb exposure | Off On |
25 | Set default settings for camera reset | (Various settings) |
27 | Reverse direction of dials | Off Main dial Quick control dial Both dials |
28 | Prevent exposure compensation with quick control dial | Off On |
* Indicates a multiple selection can be made
Comments