Sony is a leader in mirrorless cameras with its full-frame Alpha series, but as the series has expanded to four models, selecting the most appropriate one can be confusing. In the current lineup, the A9 II, A7 III, A7R IV, and A7S II are all capable models, but each provides unique advantages that may make it better or worse in any given situation.
Best Sony Full-Frame Mirrorless Camera in 2021
1. Sony a9 II
- SONY ALPHA A9 II: Compact professional cameras mastered for sports photography and photojournalism
- SUPERIOR SPEED: Fastest 35mm full-frame 24. 2MP stacked Exmore RS CMOS sensor with integrated memory
- FASTER AUTO FOCUS: Up to 20fps at full resolution with 60 AF/AE tracking calculations per second
- ADVANCED SUBJECT RECOGNITION: Real-time Tracking and Real-Time Eye AF for humans, animals and movies
2. Sony a7R IV
- Stunning resolution: world’s first 61MP full frame 35 millimeter back illuminated Exmor R CMOS Image Sensor
- High speed: up to 10Fps continuous shooting at 61MP with AE/AF tracking; 26.2MP in APS C crop mode
- Fast Hybrid Autofocus: 567 Phase detection AF points and 425 contrast AF points to cover more area
- Advanced subject recognition: real time tracking and real time eye AF for humans, animals and movies
3. Sony a9
- World’s first Full-frame stacked CMOS sensor w/ integrated memory
- World’s first blackout-free continuous shooting up to 20 fps. Battery Life (Still Images) - Approx. 480 shots...
- Silent, vibration-free, anti-distortion shutter up to 1/32,000 sec.
- 693 Phase Detection AF points over 93% frame coverage. Operating Temperature - 32 - 104 degrees F / 0 - 40 degrees C
4. Sony a7R III
- INCREDIBLE DETAIL: Shoot high speed subjects at up to 10fps with continuous, accurate AF/AE tracking
- OPTIMAL LIGHT: A back illuminated Exmor R CMOS sensor with gapless on chip lens collects more light. Operating...
- FASTER IMAGE PROCESSING: An updated BIONZ X processing engine boosts processing speeds up to 1.8x
- STUNNING HD VIDEO: Sony Alpha 7R 3 mirror less cameras record clear 4K video for editing and viewing.Bluetooth Standard...
5. Sony a7 III
- Advanced 24.2MP BSI full frame Image Sensor w/ 1.8X readout speed
- 15 stop dynamic range, 14 bit uncompressed RAW, ISO 50 to 204,800. Compatible with Sony E mount lenses. Can be connected...
- Up to 10fps silent or mechanical shutter with AE/AF tracking. Battery life (Still Images): Approx. 610 shots...
- 693 phase detection / 425 contrast AF points w/ 93 percent image coverage. Focus sensor: Exmor R CMOS sensor
6. Sony a7R II
- World’s first Full-frame 5-axis in-body image stabilization optimized for 42.4MP full-frame, 4K movie recording with...
- 2.4-million dot XGA OLED Tru-Finder w/ZEISS T- coating, connectivity to smartphones via Wi-Fi and NFC w/camera apps,...
- Shutter vibration suppression, curtain shutter, silent shutter, Resolution meets sensitivity 42.4MP up to ISO 102,400/4K...
- Fast Hybrid AF with 399 focal plane phase-detection AF points and sensor is 35 mm full-frame (35.9 x 24.0 mm), Exmor R...
7. Sony a7S II
- full-frame camera with 5-axis image stabilization
- fast and effective, enhanced fast hybrid af
- 12.2 megapixels 10 35mm full-frame exmor cmos sensor lens compatibility - sony e-mount lenses
- bionz x image processing engine ; clear image zoom :still/movie: approx. 2x
8. Sony a7 II
- World’s first 5 axis in body image stabilization in a full frame camera
- Use your favorite lenses without blur from camera shake; High 50 Mbps bit rate XAVC S21 format recording of Full HD...
- Capture stunning images with full frame, 24.3MP resolution. Lens Compensation: Peripheral shading, chromatic aberration,...
- Fast hybrid AF with phase detection: 30 percent faster than a7
9. Sony a7R
- 36.4 MP full frame CMOS sensor without an anti-aliasing/OLP filter
- Up to 4 FPS in Speed Priority Continuous shooting
- ISO 100-25600(AUTO ISO 100-6400)
- 1080/60p/24p HD video (AVCHD/MP4). Brightness Control (Viewfinder): Auto/Manual (5 steps between -2 and +2)
10. Sony a7S
- NP-FW50 Lithium-Ion Rechargeable Battery (1080mAh)
- BC-TRW W Series Battery Charger (Black)
- AC Adapter
- Micro USB Cable
11. Sony a7
- Video Capture Resolution: Fhd 1080P
- Mounting Type: Bayonet
12. Sony a99 II
- Up to 12fps at 424MP continuous shooting with AE/AF tracking, World’s first 79 hybrid AF cross-point array for...
- Operating temperature:0°C - 40°C (+32°F - +104°F)C.424MP full-frame sensor w/ no low-pass filter up to ISO 102,4004,...
- High bitrate XAVC S5 , S-log, slow/quick frame rates6, 4:2:2 HDMI out, 4D Focus hybrid phase AF w/ 79-point sensor plus...
- Wi-Fi/NFC code for easy file transfer and remote control, Dust/moisture resistant magnesium alloy body w/ 300k+ cycle...
The most obvious difference in these Sony cameras is the sensor resolution, which varies considerably from the A7R IV’s 61 megapixels down to the A7S II’s 12. The A9 II and A7 III take up the middle spots with 24 megapixels, but the A9 boasts higher performance – and a much higher price. With hands-on experience with nearly every full-frame Sony mirrorless model since the series launched in 2013, we’ve pinpointed the differences to help you figure out which is best for you.
Choosing the best Sony full-frame mirrorless camera used to be pretty straightforward, simply because there weren’t very many available.
For years, only Sony made mainstream full-frame mirrorless cameras. The Alpha A7 was the first, released in 2013. It took half a decade for the competition to begin to catch up, if we discount the various Leica models, which are too pricey for most of us.
But then in 2018, Nikon, Panasonic, and Canon all announced their first mirrorless full-frame cameras, and in 2019 we were holding expanded with new bodies and lenses.
Right now, we think the Sony a7R IV may be the best full-frame mirrorless camera you can buy. It’s small, light and relatively affordable while offering excellent performance and handling. But it’s a close call between that camera and the Sony A7R III, which is a good all-rounder at a sensible price.
Some consider the full-frame sensor to be the perfect sensor size and when it’s combined with a mirrorless camera, you get smaller camera bodies, without any reduction in image quality, all without the size of a large full-frame DSLR. Ideal for the professional and advanced photographer, looking to find the best image quality possible, along with better low-light results.
Sounds good, best? Well, if you agree, we’ve put together a list of the best full-frame mirrorless cameras currently available so you can make a more informed choice when parting with your hard-earned cash.