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Sony a1 vs sony a9 iii?

The Sony a1 is the one for resolution. It has a 50.1-megapixel full-frame sensor and dates from 2021. The Sony a9 III is the one for fast action. Its 24.6-megapixel full-frame sensor is a global shutter, so it has no rolling-shutter distortion, and it was announced in 2023.

If you shoot sport and need every frame sharp, the Sony a9 III is the better fit. If you want big files for cropping or large prints, the Sony a1 gives you far more to work with.

Either body takes these telephoto zooms, which suit sport and wildlife:

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