For photographers who often need to make choices about what gear to put in their bag and even what bag to take when they are out taking pictures or traveling, there is little room left for books. However, an Apple iPad that weighs less than a pound is a photographer’s assistant and a smart choice for travel. In addition to the many useful photography apps that are available for iPads, ranging from a depth of field calculator, a paperless model release form, and a photo storage device and portfolio, the iPad is an excellent way to carry around your library…