As Amazon Associates, we earn from qualifying purchases. This means we may receive a small commission at no extra cost to you if you click through and make a purchase.
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
When you compare the sony alpha 7 iv full frame vs alpha a7 iii 28 70mm, you see two distinct full-frame mirrorless options. Both cameras share a black finish and Sony’s Exmor R sensor technology. The main difference lies in their resolution and video capabilities. The A7 IV offers a higher 33MP count and advanced 10-bit video. The a7 III comes bundled with a 28-70mm lens and focuses on speed. You should look at the specific specs below to decide which fits your needs.
Sensor Resolution
33MP
24.2MP
Image Processor
BIONZ XR
Not listed
Max Video Resolution
4K 60p 10-bit
Not listed
Configuration
Body Only (Renewed)
With 28-70mm Lens
Continuous Shooting
Not listed
Up to 10fps
Weight
2.7 pounds
1.75 pounds
Choose the first if
- You need higher resolution for detailed still photography.
- You require advanced 10-bit 4K video recording for professional work.
- You want the latest BIONZ XR processing power.
Choose the second if
- You prefer a complete kit with a 28-70mm lens included.
- You value a lighter camera body for portability.
- You need fast continuous shooting at up to 10fps.
Verdict
The Sony A7 IV is the better choice for creators who need high-resolution stills and advanced video specs. The a7 III with the 28-70mm lens is ideal for those who want a ready-to-shoot package with a lighter body. Your decision depends on whether you prioritize image quality and video features or convenience and speed.
Sony A7 IV vs A7 III Specs
sensor resolution
Edge: Sony A7 IV Full-Frame Hybrid Camera
The Sony Alpha 7 IV features a 33MP full-frame Exmor R back-illuminated CMOS sensor. This higher resolution provides more detail in your images compared to the Sony Alpha a7 III, which uses a 24.2MP back-illuminated sensor. The extra 8.8 megapixels on the A7 IV allow for larger prints and more cropping flexibility. Both sensors are full-frame, ensuring similar low-light performance characteristics and depth of field. However, if you do not need the highest possible pixel count, the lower resolution of the a7 III is sufficient for most standard photography needs. The difference is clear when you prioritize image detail over file size.
video capabilities
Edge: Sony A7 IV Full-Frame Hybrid Camera
Video performance differs significantly between these two models. The Sony Alpha 7 IV supports up to 4K 60p recording with 10-bit 4:2:2 color depth. It achieves this through full pixel readout without binning. It also offers 4K 30p with 10-bit 4:2:2 using 7K oversampling. The Sony Alpha a7 III data does not specify its maximum video resolution or frame rates in the provided specs. Given the A7 IV’s advanced BIONZ XR processor, it handles high-bitrate video with greater ease. If you plan to shoot professional video or require higher frame rates, the A7 IV is the stronger choice. The a7 III’s video specs are not listed here, so you cannot compare them directly.
included lens
Edge: Sony Alpha a7 III with 28-70mm Lens
The Sony Alpha a7 III is sold as a kit with a 28-70mm lens. This configuration includes the lens, a lens hood, lens cap, rear cap, battery, charger, and strap. The Sony Alpha 7 IV is listed as a camera body only. You will need to purchase a lens separately to use it. For many buyers, having a lens included makes the a7 III a more complete package out of the box. The A7 IV requires you to budget for additional glass. If you want a ready-to-shoot setup without extra purchases, the a7 III kit is more practical. The A7 IV offers flexibility but demands more initial planning.
continuous shooting speed
Edge: Sony Alpha a7 III with 28-70mm Lens
The Sony Alpha a7 III can shoot up to 10 frames per second using either a silent or mechanical shutter, with continuous autofocus and exposure tracking. The Sony Alpha 7 IV data does not list its continuous shooting speed. While both cameras are capable of fast action photography, the a7 III’s 10fps rate is a confirmed specification. This speed is useful for capturing moving subjects like sports or wildlife. The A7 IV likely has a competitive rate, but without explicit data, we cannot confirm it matches or exceeds the a7 III. If high-speed burst shooting is your priority, the a7 III’s stated performance is a clear advantage.
autofocus technology
Edge: Sony Alpha a7 III with 28-70mm Lens
The Sony Alpha a7 III utilizes a hybrid autofocus system with 693 phase-detection points and 425 contrast-detection points. This setup covers 93% of the image area, providing extensive coverage for focusing on subjects anywhere in the frame. The Sony Alpha 7 IV data does not specify its autofocus point count or coverage percentage. Both cameras use Sony’s Exmor R sensor technology, which aids in autofocus performance. However, the a7 III’s detailed AF specs indicate a robust system for tracking subjects. Without specific AF data for the A7 IV, we cannot compare their tracking precision directly. The a7 III’s known coverage is a significant feature for dynamic shooting.
build and weight
Edge: Sony Alpha a7 III with 28-70mm Lens
The Sony Alpha 7 IV is larger and heavier than the a7 III. It measures 5.2 inches wide, 3.8 inches high, and 3.1 inches long, weighing 2.7 pounds. The Sony Alpha a7 III measures 3.88 inches wide, 3 inches high, and 5 inches long, weighing 1.75 pounds. The A7 IV is bulkier in width and height, while the a7 III is longer. The weight difference is nearly a pound, making the a7 III more portable for handheld shooting. If you prefer a lighter camera for travel or long days, the a7 III is more comfortable. The A7 IV’s larger body may offer better grip for some users, but it adds to the overall load.
Which Sony A7 model fits your needs?
Video creators needing high resolution footage
Our pick: Sony A7 IV Full-Frame Hybrid Camera
The Sony Alpha 7 IV records 4K video at 60 frames per second with 10-bit color depth. It uses 7K oversampling for sharp 4K 30p footage without pixel binning. The BIONZ XR processor handles this data efficiently. If you prioritize video quality and color grading flexibility in your workflow, this camera delivers the necessary technical specifications for professional results.
Photographers wanting faster burst shooting speeds
Our pick: Sony Alpha a7 III with 28-70mm Lens
The Sony Alpha a7 III shoots continuously at up to 10 frames per second. It uses phase-detection and contrast AF points for tracking moving subjects. This speed is ideal for action or sports photography. You get reliable autofocus coverage across 93% of the image area, ensuring you capture the moment without missing critical details in fast-paced scenarios.
Users preferring a lighter and more portable setup
Our pick: Sony Alpha a7 III with 28-70mm Lens
The Sony Alpha a7 III weighs 1.75 pounds and measures 3.88 by 3 by 5 inches. This makes it easier to carry for long shoots compared to the heavier A7 IV. It comes with a 28-70mm lens, providing a complete kit out of the box. If you value portability and a ready-to-use configuration, this option suits your travel needs.
Sony A7 IV Full-Frame Hybrid Camera
Best for: high-resolution photography and 4K 60p video work
- Sensor Format
- Full-frame
- Sensor Resolution
- 33MP
- Max Video Resolution
- 4K
- Image Processor
- BIONZ XR
- Color
- Black
- Dimensions
- 3.1 × 5.2 × 3.8 inches
This renewed Sony Alpha 7 IV is a full-frame mirrorless camera built around a 33MP Exmor R back-illuminated CMOS sensor. It uses the BIONZ XR processor to handle up to 4K 60p 10-bit video with full pixel readout. The body measures 5.2 by 3.8 by 3.1 inches and weighs 2.7 pounds. You get S-Cinetone color profiles for straightforward color expression. This setup suits shooters who need high resolution and advanced video capabilities in a standard body size.
- 33MP full-frame Exmor R back-illuminated CMOS sensor
- Next generation BIONZ XR image processing engine
- Up to 4K 60p 10-bit 4:2:2 video recording
- 7K oversampling for 4K 30p 10-bit 4:2:2 with no pixel binning
- S-Cinetone color profile for simple color expression
- 2.7 pounds weight is heavier than the Sony a7 III kit
- 5.2 by 3.8 by 3.1 inches body dimensions are bulkier than the a7 III
- Renewed condition means it is not brand new
- You need high-resolution 33MP stills from a full-frame sensor
- You require 4K 60p 10-bit video with full pixel readout
- You want S-Cinetone color profiles for easier grading
- You prefer a lighter camera body under 2.5 pounds
- You want a new unit with a standard manufacturer warranty
- You need a kit that includes a lens
Verdict: Sony A7 IV 33MP Full-Frame offers a significant resolution jump and advanced video specs, making it a strong choice for creators prioritizing image quality and 4K 60p performance over compact size.
Sony Alpha a7 III with 28-70mm Lens
Best for: Full-frame photography with a standard zoom lens
- Sensor Format
- Full-frame
- Sensor Resolution
- 24.2MP
- Continuous Shooting Speed
- Up to 10fps
- Configuration
- with 28-70mm Lens
- Color
- Black
- Dimensions
- 5 × 3.88 × 3 inches
The Sony Alpha a7 III is a full-frame mirrorless camera bundled with a 28-70mm lens. It features a 24.2MP BSI sensor and shoots up to 10fps. You get 693 phase-detection AF points for reliable tracking. This kit includes the SEL2870 lens and NP-FZ100 battery. It suits photographers who want full-frame quality in a versatile zoom range.
- 24.2MP BSI Full-frame sensor
- Up to 10fps continuous shooting
- 693 phase-detection AF points
- 15-stop dynamic range
- Includes 28-70mm lens
- 24.2MP resolution is lower than the 33MP sensor in the Sony a7 IV
- 10fps burst speed is slower than the 10fps+ capability of newer models
- Weighs 1.75 pounds with the included lens
- You want a complete kit with a versatile zoom lens
- You need reliable phase-detection autofocus for action
- You prefer full-frame image quality
- You need the highest resolution available from Sony
- You require a compact body-only configuration
- You want the latest sensor technology
Verdict: Sony a7 III with 28-70mm Lens offers a balanced full-frame experience with a standard zoom. It fits you if you value a ready-to-shoot kit with proven autofocus performance.
Specifications side by side
| Spec | Sony A7 IV Full-Frame Hybrid Camera | Sony Alpha a7 III with 28-70mm Lens |
|---|---|---|
| Sensor Format | Full-frame | Full-frame |
| Sensor Resolution | 33MP | 24.2MP |
| Max Video Resolution | 4K | – |
| Continuous Shooting Speed | – | Up to 10fps |
| Configuration | – | with 28-70mm Lens |
| Image Processor | BIONZ XR | – |
| Included Lens | – | 28-70mm Lens |
| Color | Black | Black |
| Dimensions | 3.1 × 5.2 × 3.8 inches | 5 × 3.88 × 3 inches |
| Weight | 2.7 pounds | 1.75 pounds |
| Model | A7 IV | ILCE7M3K/B |
| Size | – | 35-mm |
Frequently asked questions
Which Sony camera is lighter and more portable?
The Sony Alpha a7 III with 28-70mm Lens is the lighter option. It weighs 1.75 pounds, making it easier to carry for extended periods. In contrast, the Sony A7 IV Full-Frame Hybrid Camera is heavier at 2.7 pounds. You should choose the a7 III if compact size and low weight are your top priorities.
Does the Sony A7 IV include a lens in the box?
No, the Sony A7 IV Full-Frame Hybrid Camera does not include a lens in its standard package. You must purchase a lens separately. The Sony Alpha a7 III with 28-70mm Lens, however, comes bundled with a 28-70mm lens. This makes the a7 III a ready-to-shoot kit right out of the box.
Which model offers higher image resolution for photography?
The Sony A7 IV Full-Frame Hybrid Camera offers higher resolution. It features a 33MP full-frame sensor, which captures more detail than the a7 III. The Sony Alpha a7 III uses a 24.2MP back-illuminated sensor. If you need maximum detail for large prints or heavy cropping, the A7 IV is the better technical choice.
Is the Sony A7 IV better for 4K video?
Yes, the Sony A7 IV is superior for video work. It records 4K video at 60 frames per second with 10-bit color depth. It also uses 7K oversampling for sharp 4K 30p footage without pixel binning. The a7 III is capable, but the A7 IV provides advanced video specs for creators prioritizing high-quality footage.
How do the physical dimensions of these cameras compare?
The Sony A7 IV is slightly larger and boxier than the a7 III. The A7 IV measures 5.2 inches wide, 3.8 inches high, and 3.1 inches long. The a7 III measures 5 inches long, 3.88 inches wide, and 3 inches high. Both share a black finish, but the A7 IV has a bulkier profile.
Which camera is best for a balanced full-frame experience?
The Sony Alpha a7 III with 28-70mm Lens fits you if you want a balanced kit. It includes a standard zoom lens, providing a ready-to-shoot experience. The A7 IV is better if you prioritize image quality and video performance over having a lens included. Choose the a7 III for a proven, complete package.
