The α7 IV is Sony’s 33 MP full-frame mirrorless camera aimed at both stills and video. It offers the BIONZ XR processor, 759-point phase-detection AF with human, animal and bird eye tracking, 5.5-stop sensor-shift stabilisation, a vari-angle touchscreen and CFexpress Type A and UHS-II SD slots, and records 4K 60p in 10-bit 4:2:2. Independent testing highlighted that full-width 4K is oversampled from 7K and very detailed, while 4K 60p uses a 1.5× crop; 10 fps bursts are only available with lossy compressed RAW. Owners praise image quality and autofocus; the menus take time to learn.
ILCE-7M4 body (body only) and ILCE-7M4K / 7M4M kits (with the FE 28-70 mm lens). The α7 III and α7 V are separate models.
| Specification | Value |
|---|---|
| Sensor | 35 mm full-frame (35.9 × 23.9 mm) back-illuminated Exmor R CMOS; about 33.0 MP effective (34.1 MP total) |
| ISO | Stills ISO 100–51200 (expanded 50–204800); movies ISO 100–51200 (expanded up to 102400) |
| Autofocus | Fast Hybrid AF; 759 phase-detection points (full frame); EV -4 to 20; human, animal and bird eye detection (stills and movies) |
| Image stabilisation | 5-axis sensor shift; 5.5 stops (CIPA) |
| Shutter and burst | Mechanical/electronic 1/8000–30 s, Bulb; flash sync 1/250 s; Hi+ 10, Hi 8, Mid 6, Lo 3 fps |
| Viewfinder | 0.5-inch OLED, 3.69 million dots; 100% coverage, about 0.78× magnification; 60/120 fps |
| Monitor | 3.0-inch TFT touchscreen, 1.04 million dots; vari-angle (about 176° opening, 270° rotation) |
| Video | Up to 4K 60p/50p in 10-bit 4:2:2; XAVC HS (H.265) up to 200 Mbps, XAVC S (H.264) up to 200 Mbps, XAVC S-I up to 600 Mbps |
| Card slots | Slot 1: CFexpress Type A or SD; Slot 2: SD; both slots accept UHS-I and UHS-II SD |
| Connections | USB Type-C (charging/power with USB Power Delivery), Multi/Micro USB, 3.5 mm mic and headphone, Multi Interface Shoe with digital audio interface |
| Wireless | Wi-Fi 802.11a/b/g/n/ac (2.4 and 5 GHz); Bluetooth 4.1 |
| Battery | NP-FZ100 rechargeable battery |
| Dust protection | Charge protection coating on the optical filter and sensor-shift mechanism |
| Size and weight | 131.3 × 96.4 × 79.8 mm; about 658 g with battery and card |
Sony presents the α7 IV as a core full-frame model for both photography and filmmaking, with a newly developed 33 MP back-illuminated Exmor R sensor, BIONZ XR with up to eight times the processing power and Real-time Eye AF. Sony Thailand
DPReview’s in-depth review notes that 4K 60p is taken from a 4.6K region in Super35/APS-C mode with a 1.5× crop, while full-width 4K is oversampled from 7K up to 30p and is clearly more detailed. Estimated sensor readout is about 1/15 s for 14-bit stills, so moving subjects can skew with the electronic shutter. Video readout is about 27.4 ms in full-width 4K and 12.8 ms at 60p. The CIPA battery rating is 580 shots with the LCD and 520 with the EVF. 10 fps only applies to 12-bit lossy compressed RAW; with lossless or uncompressed 14-bit RAW the rate drops to about 6 fps. Eye detection was found slightly less accurate than earlier Sony models, and the rear screen’s resolution was criticised as low.
DPReview: Sony a7 IV reviewOn Best Buy’s body-only page there are 619 reviews and 97% of buyers recommend it. All 19 visible reviews are five-star incentivised verified purchases. Image quality, focus tracking, low-light performance and E-mount lens choice are praised; AlbertoB finds sharpness enough for large prints after a year, and Bronxin, moving from the α7 III, highlights 10-bit video. BlizTarget and Bronxin say the menus take time to learn, and Rickman writes after five months that firmware updates are cumbersome and a spare battery is needed for long shoots. Overheating is mentioned in 15 reviews on the page; none of the visible reviews reports it first-hand, and srhm says there were no issues after changing the heat setting.
Best Buy: Sony Alpha 7 IV body customer reviews