An apparatus for limiting the use of a network address acquires identification data specific to a device connected to the network and generates a message preventing the device from using a network address generated based on the identification data. An apparatus for limiting data transfer detects that a device connected to a network sends data containing a network address generated based on an identifier specific to the device and prevents such data from being transferred.

 
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< Optical element and optical apparatus having the optical element

> Image sensing apparatus having autofocus function, and method of controlling same

> Imaging apparatus and imaging system

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