Focal Length in Prompts: 24mm to 200mm - Nano Banana 2

At 24mm and below, space stretches. Whatever is nearest the lens looms, the background retreats, and a room looks considerably larger than it is. Faces get distorted — the nose grows, the ears shrink back, the head takes on a slight balloon quality. That distortion is a tool if you want a scene to feel immersive or slightly aggressive, and a mistake if you wanted a flattering portrait.

50mm sits close to how a scene looks to the eye. Nothing is exaggerated, nothing is flattened. It is the safe answer and often the right one, particularly for images where you want the viewer to accept the space without noticing the camera.

The number alone works, but it works better with a phrase that describes the result — partly because it gives the model a second route to the same look, and partly because it forces you to check that you actually want that effect.

“200mm telephoto, background mountains compressed and looming close behind her” is a stronger instruction than “200mm” on its own. “24mm wide angle, foreground hand large in frame, room stretching away behind” beats “24mm.” The number sets the family; the description picks the member.