Pentax K-5 II Operating Manual page 57

Push the SO Memory Card in once to
remove.
4
Close the card cover and then
slide it in the direction of the
arrow
(@~@).
Be sure to fully close the card cover. The camera will not turn on if the card
cover is open.
For details on the approximate number of still pictures and amount of time of
movies that can be recorded on an SO Memory Card, refer to "Approximate
Image Storage Capacity by Size" (p.320).
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