Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 597)

597
Troubleshooting Guide
Shooting-Related Problems
The lens cannot be attached.

The camera cannot be used with RF or EF-M lenses ( = 54).
The viewfi nder is dark.
 Install a recharged battery in the camera ( = 44).
No images can be shot or recorded.
 Make sure the card is properly inserted ( = 48).
 Slide the card’s write-protect switch to the Write/Erase setting ( = 48).
 If the card is full, replace the card or delete unnecessary images to make
space ( = 48, = 350).
 You cannot take a picture when focusing with One-Shot AF and the focus
indicator <
o
> in the viewfi nder is blinking or when the AF point is orange
during Live View/movie shooting. Press the shutter button halfway again
to refocus automatically, or focus manually ( = 57, = 147).