Sony a1 Mirrorless Camera Body, Black {50.1MP}

Sony a1: 50.1MP full-frame stacked sensor meets 30 fps burst.

The a1 pairs a 50.1MP full-frame stacked Exmor RS CMOS sensor with dual BIONZ XR processors, delivering blackout-free continuous shooting at 30 fps via electronic shutter and 10 fps via mechanical shutter. The AF system covers approximately 92% of the frame with 759 phase-detect points, calculates AF/AE up to 120 times per second, and reliably focuses down to -4 EV. Real-time Eye AF handles humans, animals, and birds, with tenacious subject tracking that reviewers found produced nearly 100% hit rates in real-world testing.

The electronic shutter earns its keep here. Fast sensor readout minimizes rolling shutter distortion compared to the a9 II, and the a1 is the first Alpha camera to sync flash via electronic shutter, at up to 1/200 sec in full-frame mode. The mechanical shutter, rated for 500,000 actuations, adds 1/400 sec flash sync and a top speed of 1/8000 sec. Both shutters support flicker-free shooting under artificial light.

Video runs to 8K UHD at up to 29.97 fps internally in 10-bit XAVC HS, with 4K up to 120 fps at 10-bit 4:2:2. The 9.44-million-dot OLED EVF runs at up to 240 fps with 0.9x magnification. On the workflow side, the body includes an RJ45 Ethernet port, Wi-Fi 5, Bluetooth 5.0, and a USB-C port for tethered shooting and charging. Dual slots accept CFexpress Type A and SDXC UHS-II cards, giving you redundancy or the option to split RAW and JPEG across formats. The 5-axis IBIS is rated at 5.5 stops CIPA, and the weather-sealed body keeps shooting viable in demanding field conditions.

Who It's For

Sports and wildlife photographers who can't choose between resolution and speed get 50.1MP files at 30 fps with AI-driven bird and animal Eye AF covering 92% of the frame. Documentary and photojournalist shooters working under mixed artificial light will use the flicker-free electronic shutter with flash sync up to 1/200 sec for silent, unobtrusive coverage. Hybrid shooters billing clients for both stills and video can deliver 8K UHD at up to 29.97 fps or 4K at 120 fps in 10-bit 4:2:2 internally, with 16-bit RAW output over HDMI for maximum post flexibility. Studio photographers working with flash get 1/400 sec mechanical shutter sync, plus Pixel Shift Multi Shooting for up to 16-frame composites when subject motion allows.

Key Features

• 50.1MP full-frame stacked Exmor RS CMOS sensor with dual BIONZ XR processors
• 30 fps continuous shooting with electronic shutter, 120 AF/AE calculations per second
• 759 phase-detect AF points covering 92% of frame, Real-time Eye AF for humans, animals, and birds
• 8K 29.97 fps 10-bit 4:2:0 and 4K 120 fps 10-bit 4:2:2 internal video recording
• 9.44-million-dot OLED viewfinder with 0.9x magnification and 240 fps refresh rate
• Electronic shutter flash sync to 1/200 sec, mechanical shutter to 1/400 sec
• 5-axis in-body stabilization rated 5.5 stops CIPA
• Dual CFexpress Type A and SDXC UHS-II card slots with Wi-Fi 5 and USB-C

FAQ

What's the maximum burst rate, and does it change based on file format?

30 fps with the electronic shutter using compressed RAW or JPEG. Switch to uncompressed or lossless compressed RAW, and you're limited to 20 fps. The mechanical shutter maxes out at 10 fps regardless of format.

Can you use flash with the electronic shutter?

Yes, for the first time in an Alpha camera. Electronic shutter flash sync reaches 1/200 sec in full-frame mode, or 1/250 sec in APS-C crop. The mechanical shutter handles faster sync at 1/400 sec full-frame or 1/500 sec in APS-C.

How does the autofocus perform in low light?

The AF system focuses down to -4 EV, a 1 EV improvement over the a9 II and a7R IV. With 759 phase-detect points covering 92% of the frame and 120 AF/AE calculations per second, real-world tracking produces nearly 100% hit rates for humans, animals, and birds.

What video formats does the a1 support internally?

8K UHD at up to 29.97 fps in 10-bit 4:2:0 XAVC HS, and 4K up to 120 fps in 10-bit 4:2:2. You can also output 16-bit RAW at 4.3K via HDMI to an external recorder.

What's the rolling shutter distortion like on the electronic shutter?

Fast sensor readout produces about 1.5x less distortion than the a9 II. Panning and fast subject motion show minimal skewing compared to competing systems, making the e-shutter practical for most handheld work.

Do both card slots accept the same format?

No. One slot takes CFexpress Type A; the other accepts SDXC UHS-II. You can split RAW and JPEG across formats, use one slot for overflow when the other fills, or record to both simultaneously for backup.

How long can you record 8K video continuously?

Up to 30 minutes of 8K/30p or 4K/60p, provided you have sufficient card capacity and thermal conditions remain within spec. A revised heat-dissipating structure makes this possible without increasing body size.