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116 Wi-Fi and NFC

The camera will time out only after the transfer is finished.

TIP: I’ve found the process of downloading images to the computer via Wi-Fi to
be a fickle process at best. Even after a successful transfer, a subsequent
attempt might be unsuccessful. Sometimes just moving the camera from one
side of my desk to the other solved the problem, telling me the connection is
very susceptible to stray radio sources and interference. I’m not sure
uploading pics to your computer via Wi-Fi is a preferable method compared to
using a USB cable or just inserting the memory card into your computer.

4.2.3 THROUGHPUT RATES

And now, a First World Problem: The camera has 24 megapixels and the
images are so detailed that it will seem to take forever to transfer the
images over to your computer (this is especially true if you’re sending
RAW files). In one of my tests it took 6:34 minutes to transfer 236 MB of
images; this works out to be a speed of 4.7 megabits per second.

“4.7 Mbps? Isn’t my 802.11n Wi-Fi rated at 300 megabits per second?”
Well, that’s a maximum theoretical rate and your actual speed depends
upon a great many factors, including the distance from the router, building
materials between devices, the number of devices that are actively
communicating (especially devices that are streaming movies at the same
time), and what else your computer is doing. Plus there’s the protocol
overhead involving preamble, error detection and correction, and packet
retransmission on noisy networks. My network is pretty modest so I’d say
it’s reasonable to expect no more than 5 mbps throughput rate from a Wi-Fi
camera transfer.

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