The Shutter Only Releases after Pressing the Shutter Button Twice (The Mirror is Locked Up)
06-Mar-2015
8202548200
Solution
During viewfinder shooting, if the shutter does not release when the shutter button is pressed fully, check the [9: Mirror lockup] setting in [ 
Custom Functions (C.Fn)] ] from the menu on the LCD. If the setting is set to [Enable], change it to [Disable] to disable the mirror lockup.
Custom Functions (C.Fn)] ] from the menu on the LCD. If the setting is set to [Enable], change it to [Disable] to disable the mirror lockup.NOTE
If the Mirror lockup is set, the mirror swings up when the shutter button is pressed fully, and the viewfinder is blacked out. When the shutter button is pressed fully again, the mirror goes down and the picture is taken.
The camera's mechanical shake caused by the reflex mirror action can blur images taken with a super telephoto lens or close-up (macro) lens. In such cases, mirror lockup is effective.
For details about mirror lockup, refer to the instruction manual that came with your camera.
If 30 sec. elapse after the mirror is locked up, it will go back down automatically. Pressing the shutter button completely again locks up the mirror again.
To disable the Mirror lockup setting, follow the steps below.
IMPORTANT
The position and shape of the operation buttons may differ depending on the model you use.
1. Set the camera’s power switch to [ON].
2. Press the [MENU] button to display the menu.
3. Press the [ 
], [ 
] keys to select the [ ] tab.
], [ ] keys to select the [ ] tab.
4. Press the [ 
], [ 
] keys to select [Custom Functions (C.Fn)], then press [ 
].
], [ ] keys to select [Custom Functions (C.Fn)], then press [ ].
5. Press the [ ], [ ] keys to select [9: Mirror lockup], then press [ ].
], [ ] keys to select [9: Mirror lockup], then press [ ].
6. Press the [ ], [ ] keys to select [0:Disable], then press [ ].
], [ ] keys to select [0:Disable], then press [ ].