Learn About Imaging
Focus
The focus of a camera determines how ”sharp” an image is. Our eyes see this as blurred lines, and similarly, when the light is not focused on the image, as shown in the photos below, the particles are blurred. By placing the sensor, object of interest, and the lens at the appropriate distances, the image is brought into focus, and the light converges on the sensor as shown from android authority:
When the lens is too close to the sensor or too far, the image appears blurry. The correct focus may be visually identified through adjustment until the particles have crisp, clear edges as shown:
An out of focus image, where the particles are not easily distinguished from each other.
An image slightly out of focus. When the particle edges are blurred and non-distinct.
An image in focus, with distinct particles and no blurring.
Author: Jack Elliott
Date Published: June, 2022