The used Sony Alpha a7S is an ultra-sensitive, full-frame E-mount mirrorless camera that’s been optimized for video capture. Looking for an updated version? Check out the Sony Alpha a7S III. Key features include:

• Excellent low-light performance and color accuracy
• Uncompressed 4:2:2 UHD 4K video output
• 1080p video capture at 60p
• Wi-Fi and NFC smart-device connectivity

12.2MP Full-Frame Exmor Sensor and BIONZ X Image Processor. Rather than focus on high-resolution still-image quality, the a7S sets its sights on low-light performance. The a7S features a native sensitivity range of ISO 100-102,400 (expandable to ISO 50-409,600) with a new-generation RGB color filter array and gapless on-chip lens design for great color accuracy in all lighting conditions.

Full Pixel Readout with Clean HDMI Out for 4K Recording. The 12MP sensor features full sensor readout, eliminating major aliasing and moiré whether recording internally at 1080p or externally in UHD 4K. If you need internal 4K capture check out the Sony Alpha a7S III. The a7S is able to output uncompressed 4:2:2 UHD 4K video to an optional external recorder over HDMI, as well as record full HD 1080p video in the high-quality XAVC S format at 50 Mbps in multiple frame rates.

Advanced Video Features. The a7S supports S-Log2 gamma, which helps to expand the effective dynamic range during recording. There are also picture profile options and zebra marker display aids. It also offers flexible timecode options. The internal stereo mic captures audio in AAC/Linear PCM format with a built-in headphone jack for on-board monitoring, while the external mic input allows for higher-quality recording.

Ultra-Fast Video Recording. In addition to the standard 24p/30p/60i recording formats, 1080p video can be recorded at up to 60p. By dropping down to 720p, you can capture up to 120fps using an APS-C center crop of the sensor.

E-mount. Sony has created its line of FE lenses for the a7 series. These full-frame lenses use the E-mount, but provide a larger image circle for covering the full-frame sensor. The existing APS-C E-mount lenses are compatible with the full-frame a7-series; however, you’ll have to shoot in crop-frame mode or accept any vignetting caused by the smaller image circle.

Other Notable Features. The a7S has built-in Wi-Fi and NFC capability for connecting to smart devices, as well as an app store for adding features—like Sony’s Smart Remote—to the camera. There’s also the option to remotely control the camera via USB. You get the same menu system found in the a99 and RX1 / RX1R, rather than the entry-level menu found in previous NEX cameras. It records its 14-bit RAW images, JPEGs, and video files to SDHC/XC memory cards, and uses the rechargeable NP-FW50 battery that’s rated for 340 shots per charge.

Please note:

• Recording HD video in the XAVC S codec requires an SDXC memory card. In other words, a card that is 64GB or larger.