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New Contributor
Posts: 1
Registered: ‎01-23-2017

My Cannon Rebel T3i won't take pictures in the dark with the flash on.

Does anyone know how to fix this issue, please?  Thank you so much!

Esteemed Contributor
Posts: 3,489
Registered: ‎02-17-2016

Re: My Cannon Rebel T3i won't take pictures in the dark with the flash on.

It is probably not achieving focus. Have you tried it in manual focus?

 

Do you have it set for "disco flash"?  i.e., use the pop-up flash for focus assist.

Esteemed Contributor
Posts: 3,816
Registered: ‎06-11-2013

Re: My Cannon Rebel T3i won't take pictures in the dark with the flash on.

This is likely because there isn't enough light to focus. 

 

If the camera is in "One Shot" mode (which is the default) then it will not take a shot until it can confirm that it has locked focus.  It will take a shot if you switch to manual focus.  It will also take a shot if it is in "AI Servo" focus mode (however that mode will take a shot even if it hasn't focused... use with caution or you may be find your shots weren't actually focused.)

 

The camera has auto-focus assist that can use pulses of light from the flash to attempt to provide enough light to help the camera focus.  But this function can be disabled via in-camera menus (it is enabled by default).  This feature will only be used if the built-in flash is raised up (Note: If you are in P, Av, Tv, M or A-Dep mode it will not flip up on it's own.  There is a button on the front of the camera - left side - just above the lens release which resembles a lightning bolt which can be used to manually pop-up the flash.)

 

Some Canon external speedlites (such as the Speedlite 600EX-RT and 600EX II-RT, the 430EX III-RT and 430EX II) have a much better AF-assist beam that uses a red pattern (the light is behind the red lens in the lower part of the speedlite body) and the camera can use that pattern to lock auto-focus even in complete darkness.)  

 

 

 

Tim Campbell
5D III, 5D IV, 60Da
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