The Sony A7s is a high-sensitivity, full-frame mirrorless camera. It features a 12 megapixel sensor. Though smaller in size, there are less photodiodes on the actual sensor which makes it much more efficient in low light conditions.
The A7s features internal 1080p video and 4k via the HDMI port to an external recorder.
Introduced in April 2014, this is the first in the series of “s” branded A7 cameras.
I bought mine when it came out and I still use it today. It is somewhat specialized for low light and video, but its an excellent performer.
• High Sensitivity design for low-light applications
• 12.2 Megapixel Exmor CMOS
• Bionz X Image Processor
• Native ISO: 100-102400
• Expanded ISO: 50-409600
• 25 point contrast detection autofocus points
• 1/250 flash sync
• 5fps burst rate
• Flash Exposure Lock
• First-Curtain mechanical and electronic shutter
• Gapless On-chip Lens
• Live-view and tethered capture
• AF Sensitivity -4 ~ 20 EV
• Metering Sensitivity -3 ~ 20 EV
• 3 Custom User Buttons
• 921.6 K Monitor Resolution
• 0.71× Viewfinder Magnification
• MPEG-4, AVCHD (28 Mbit/s), XAVC S (50 Mbit/s) 1080p internal video recording
• Full-pixel readout video sampling
• 120fps at 720p
• Clean 4k HDMI output
• Video Light Mode
• Full magnesium alloy chassis
• Stainless steel bayonet mount
• 127×94×48 mm
• 446 g