Canon EOS 90D, Instruction Manual, Page: 810 / 888

598
Troubleshooting Guide
The card cannot be used.

If a card error message is displayed, see
=
50 or
=
613.
An error message is displayed when the card is inserted in
another camera.

Since SDXC cards are formatted in exFAT, if you format a card with this
camera and then insert it into another camera, an error may be displayed
and it may not be possible to use the card.
I have to press the shutter button twice to take a picture.

Set
[
z
: Mirror lockup]
to
[Disable]
.
The image is out of focus or blurred.

Set the lens’s focus mode switch to <
AF
> (
=
54).

Press the shutter button gently to prevent camera shake (
=
56,
=
57).

With a lens equipped with an Image Stabilizer, set the IS switch to <
1
>.

In low light, the shutter speed may become slow. Use a faster shutter
speed (
=
112), set a higher ISO speed (
=
213), use fl ash (
=
164,
=
179), or use a tripod.

See “Minimizing Blurred Photos” on
=
78.
There are fewer AF points or the Area AF frame shape is
diff erent.

Depending on the lens used, the number of usable AF points, AF point
patterns, Area AF frame shape, etc. vary.