You cannot do this with the m530 itself. However, you can use a card
reader to connect the memory card to your computer and use a program to
piece together the files, whose data are still present on the card
(providing you stopped taking photos, of course).
The best program to use is called
PhotoRec and you can
find it here. It's free, released under the GNU licence.
Save any photos you recover to your computer... not to the card itself.
Comment back if you need help getting a card reader.
This post will probably be followed by people advertising commercial programs that do the same thing as PhotoRec. They're probably fine, but they won't be any better for being paid for.
Also, comment back if the deleted photos were in the internal memory.
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