Sony a7 IV
vs Sony a7 III
vs
Both builds use the Sony FE 16-35mm f/2.8 GM II so you can pin one and flip the body in the simulator.
| Sony a7 IV | Sony a7 III | |
|---|---|---|
| Sensor size | 35.9 × 23.9 mm | 35.6 × 23.8 mm |
| Crop factor | 1× | 1.01× |
| Sensor class | Full Frame | Full Frame |
| Native mount | E | E |
| Aspect modes | 3:2 · 16:9 | 3:2 · 16:9 |
| Released | 2021 | 2018 |
Because the a7 IV has the larger sensor, the same focal length reads wider on it. Here's the full-frame-equivalent and horizontal field of view for each at common focal lengths.
| Lens focal | a7 IV (1×) | a7 III (1.01×) |
|---|---|---|
| 16mm | 16mm · 96.6° | 16mm · 96.1° |
| 24mm | 24mm · 73.6° | 24mm · 73.1° |
| 35mm | 35mm · 54.3° | 35mm · 53.9° |
| 50mm | 50mm · 39.5° | 51mm · 39.2° |
| 85mm | 85mm · 23.8° | 86mm · 23.7° |
What's the crop-factor difference between the a7 IV and the a7 III?
The a7 IV is 1× and the a7 III is 1.01×. The a7 IV is wider — with the same lens it captures roughly 1% more horizontal field of view than the a7 III.
Do the a7 IV and a7 III use the same lenses?
Yes — both are E mount, so any lens (or adapter) works identically on either.
Which is wider, the a7 IV or the a7 III?
The a7 IV. Its larger sensor (1× vs 1.01×) sees a wider field of view from any given focal length.