Canon Eos Rebel T6i 750d Instruction Manual

371
Troubleshooting Guide
The camera cannot be used with EF-M lenses (p.45).
 Install a recharged battery pack in the camera (p.
34).
 Make sure the card is properly inserted (p.
37).
 Slide the card’s write-protect switch to the write/erase position (p.
37).
 If the card is full, replace the card or delete unnecessary images to 
make space (p.37, 304).
 If you try to focus in the One-Shot AF mode and the focus indicator 
 in the viewfinder blinks, a picture cannot be taken. Press the 
shutter...

Troubleshooting Guide
372
Set the AF operation to One-Shot AF. Focus lock is not possible in the 
AI Servo AF mode, or when servo takes effect in AI Focus AF mode 
(p.100).
 Depending on the subject, linear noise or moire may be recorded in 
the image. It is likely to occur especially in the following cases.
• Shooting fine horizontal stripes, lattice patterns, etc.
• When there is an intense light source such as sunlight or lighting in
or near the shooting range.
In such a case, noise and moire may be...

373
Troubleshooting Guide
Depending on the lens type, shutter speed, aperture, subject 
conditions, brightness, etc., the continuous shooting speed may 
become slower.
 If [z 3: Anti-flicker shoot. ] is set to [Enable] and you shoot under a 
flickering light source, the continuous shooting speed may become 
slightly slower, or the continuous shooting interval may become 
irregular. Also, the time lag until shutter release may be slightly longer 
than usual (p.144).
 If you set [ Distortion ] to...

Troubleshooting Guide
374
Set [ z2: Auto Lighting Optimizer ] to [Disable ]. When [ Low], 
[ Standard ], or [High] is set, even if you set a decreased exposure 
compensation or flash exposure compensation, the image may come 
out bright (p.136).
 If you shoot at night when the background is dark, the shutter speed 
automatically becomes slow (slow-sync shooting) so that both the 
subject and background are properly exposed. To prevent a slow 
shutter speed, under [ z1: Flash control ], set [Flash sync....

375
Troubleshooting Guide
If you use a flash unit other than an EX-series Speedlite, the flash will 
always be fired at full output (p.172).
 Under [ z1: Flash control ], if [Flash metering mode] in [External 
flash C.Fn setting ] is set to [TTL flash metering ] (autoflash), the 
flash will always fire at full output (p.178). 
 If flash exposure compensation is set with the external Speedlite, flash 
exposure compensation cannot be set with the camera. When the 
external Speedlite’s flash exposure...

Troubleshooting Guide
376
It indicates that the camera’s internal temperature is high. If the white 
 icon is displayed, the still photo’s image quality may deteriorate. 
If the red < E> icon is displayed, it indicates that the Live View or 
movie shooting will soon stop automatically (p.218, 253).
 If the card’s writing speed is slow, movie shooting may stop 
automatically. Use an SD Speed Class 6 “ ” or faster card. To 
find out the card’s reading/writing speed, refer to the card 
manufacturer’s Web...

377
Troubleshooting Guide
Flickering, horizontal stripes (noise), or irregular exposures can be 
caused by fluorescent lighting, LED lighting, or other light sources 
during movie shooting. Also, changes in the exposure (brightness) or 
color tone may be recorded. In the < a> mode, a slow shutter speed 
may reduce the problem.
 If the camera is connected to a computer, printer, GPS receiver, TV 
set, or other device with a cable, Wi-Fi cannot be set ([ 51: Wi-Fi/NFC ] 
will be grayed out). Disconnect...

Troubleshooting Guide
378
Set the color space to sRGB. If Adobe RGB is set, the first character 
will be an underscore (p.146).
 It is a movie file (p.262).
 If the card already contains recorded images, the image number may 
not start from 0001 (p.262).
 Check that the correct date and time are set (p.42).
 Check the time zone and daylight saving time (p.42).
 The shooting date and time do not appear in the picture. The date and 
time are instead recorded in the image data as shooting information....

379
Troubleshooting Guide
[Eye-Fi settings] will appear only when an Eye-Fi card is inserted in 
the camera. If the Eye-Fi card has a write-protect switch set to the 
LOCK position, you will not be able to check the card’s connection 
status or disable Eye-Fi transmission (p.352).
 It is the highlight alert (p.310). Overexposed areas with clipped 
highlight will blink.
 If the image is protected, it cannot be erased (p.302).

Movies edited with a computer cannot be played back with the camera.
 If...

Troubleshooting Guide
380
Check that the HDMI cable or stereo AV cable’s plug is inserted all the 
way in (p.298-301).
 Set the [ 53: Video system ] correctly to [NTSC] or [PA L ] (depending 
on the video system of your TV set).
 If [51: Wi-Fi/NFC ] is set to [Enable], the camera cannot be connected 
to a TV set. Set [ Wi-Fi/NFC] to [Disable ], then reconnect the camera 
to the TV set with the HDMI cable or stereo AV cable.
 If the movie file size reaches 4 GB, another movie file will be created...