It depends on your budget, For high-end 24mm lens, get Sony FE 24mm f/1.4 GM or Sigma 24mm f/1.4 DG DN Art.

For compact & lightweight lens, get Sony FE 24mm f/2.8 G or Tamron 24mm f/2.8.

There are several great 24mm lens options available for Sony E-mount cameras:

1. Sony FE 24mm f/1.4 GM

• Pros: Excellent sharpness even wide open, beautiful bokeh, fast f/1.4 aperture, weather-sealed
• Cons: Large and heavy, expensive at around $1400

2. Sony FE 24mm f/2.8 G

• Pros: Compact and lightweight, very sharp, fast and quiet AF, less than half the price of the GM at around $600
• Cons: 2 stops slower than the f/1.4 GM, some distortion

3. Sigma 24mm f/3.5 DG DN Contemporary

• Pros: Most affordable option around $300, very compact, decent sharpness and contrast
• Cons: Slowest aperture at f/3.5, build quality not as good as Sony lenses

4. Tamron 24mm f/2.8 Di III OSD M1:2

• Pros: Very sharp, fast f/2.8 aperture, affordable around $350, 1:2 macro capability
• Cons: Slower AF than Sony lenses, some chromatic aberration

Ultimately, the best 24mm lens for you depends on your budget and needs. For the highest optical quality and low light capability, the Sony 24mm f/1.4 GM is the top choice if you can afford the price and size. For a more compact and affordable option that still delivers great IQ, the Sony 24mm f/2.8 G is an excellent pick. And for those on a tighter budget, the Sigma and Tamron provide very good performance for the price.

I love my FE 24mm f/1.4 GM.

Sony FE 24mm f/1.4 GM is the best choice.

For your Sony A7IV, the Sony FE 24mm f/1.4 GM is an excellent choice, renowned for its sharpness, low distortion, and exceptional performance in low-light conditions, making it ideal for landscapes, cityscapes, and astrophotography. Another strong contender is the Sigma 24mm f/1.4 DG DN Art, which offers similar high-quality optics with great edge-to-edge sharpness and a fast aperture, making it a versatile and slightly more affordable alternative. Both lenses provide superior image quality and build, tailored for capturing stunning wide-angle scenes and night skies.

Sigma 24mm f/1.4 DG DN.

FE 24mm F1.4 GM is overall the best choice.