A fisheye look is mainly useful for its creative style, not for general-purpose correction or realism. True fisheye lenses are valued because they capture an extremely wide angle of view, sometimes even beyond 180°, by allowing straight lines near the edges to curve instead of staying rectilinear. That makes them smaller, simpler, and able to show more of a scene.

On your camera, the digital fisheye effect is mostly a simulation of that look. Its best use is when you want an intentionally exaggerated, immersive, or playful perspective—such as emphasizing a very wide scene or creating a “looking through a glass ball” feel.

To get stronger results:

• Use subjects with lots of space around them.
• Place the main subject near the center if you want it less distorted.
• Move important straight lines away from the frame edges unless you want obvious bending.
• Use the distortion deliberately for dramatic or unusual compositions.

If you want a natural-looking image, avoid the effect. If you want a bold, stylized ultra-wide look, fisheye can work well.