In the “learn something new” department, I ran across an interesting discovery today.
First, some setup. I woke up before dawn to catch the sunrise in the Columbia River Gorge, and for some reason my camera’s battery didn’t last very long—I think it was the combination of the cold weather, composing my shots using Live View, and transferring the images from my Eye-Fi card to my iPad. With a full day of shooting ahead, and only one extra battery available, I was in trouble.
Jump ahead a few hours, I want to transfer my newest photos to the iPad but not kill the spare battery in the camera. So, I attach my iPad Camera Connection SD adapter to copy the photos directly. The problem is that connecting the SD card to the iPad using the adapter means I need to import the raw versions of my photos in addition to the JPEGs. (I’m shooting raw+JPEG so I can edit better-quality photos on the iPad than the previews generated by the camera.) What I want to do is import into ShutterSnitch which includes an option to copy only JPEG images.
That brings me to the surprise: I opened ShutterSnitch to see if it could import directly from the adapter (it can’t; Apple blocks access to the sync port, I believe), but suddenly the photos started importing anyway. The trick is that I’m using an Eye-Fi card. And when the card is connected to the iPad using the camera adapter, the iPad is also supplying the card with power, which in turn activates the Eye-Fi’s wireless hotspot.
So even though the card is physically connected to the iPad, it’s transferring images via Wi-Fi! Pretty cool when you don’t want to tax your camera battery and bypass the Camera Roll.