This book is a guide to using the Sony a7 and a7R, the first full frame, autofocus system cameras. At half the weight of a full frame DSLR, they are easy to carry for photographers on the go. The less-expensive a7 has a 24-megapixel sensor for shooting rapidly changing scenes; the a7R has a 36-megapixel sensor designed for ultimate image sharpness. Both use advanced image-processing algorithms and can use any manufacturer's lens when matched with the appropriate adapter. The electronic viewfinder gives the photographer an accurate preview of the image, ensuring the capture of technically...