The a7 IV has a lossless compression option, for when you need maximum processing flexibility, but the burst rate drops to around 6 fps if you use it. Sony says the camera's buffer depth allows over 800 Raw+JPEG images (or over 1000 JPEGs), but this is in the uncompressed Raw format, which again shoots at around 6 fps. The A7 III can shoot up to 10fps with continuous AF. Up to 8fps, it shows you live view with blackouts. The A7s II is much slower. It can reach a maximum of 5fps with AF locked on the first frame, and a slower 2.5fps with AE/AF Tracking. Clearly the camera is not designed for action photography. The Alpha 7S starts and shoots in 1.7 seconds, focuses and fires in 0.05-second in bright light, and does the same in about 0.8-second in very dim light. In Speed Priority mode, which locks focus It’s taken Sony five years to upgrade the video-centric A7S II to a Mark III, but the wait has been worth it for keen enthusiast and professional moviemakers. It might not boast 6K or 8K video resolution of some of its rivals, and with only 12.1MP it’s not a powerhouse super-stills machine either. Sony A7 II (Black) at Amazon for $792.37; Sony Alpha A7 II specs. Sensor: 24.3MP full-frame CMOS. Lens mount: the Sony Alpha A7S II and A7R II both supported uncompressed raw shooting. Sony a7S Specs. Announced Apr 6, 2014 • 12 megapixels | 3 Sony ZV-1 Mark II. Sony ZV-E1. Latest reviews. Fujifilm X-S20. 86 % Sony a7CR review. 88 % Camera Weight. glb. 489 g. 1.08 lb. 489 g. 1.08 lb. The Sony a7S scores a solid 55/100. Announced on April 6th, 2014, this mirrorless camera was launched at a price of $2,499. With dimensions of 127 x 94 x 48mm and weighing 489g or 1.08lbs, it is a compact and lightweight option. Resolution. 4288 x 2848. Sensor photo detectors (Mpix) 12.21. Sensor size (mm) 23.8 x 35.6. Color filter array. RGB. Pixel pitch (µm) 0UNrPQP.