AVIXA Recognized AV Technologist Test

What negative visual effect is caused by curvature of field?

1. Blurry edges

2. Hot spotting

3. Cresting

4. Color shift

The correct answer is: Blurry edges

Curvature of field refers to a situation where the image plane does not align perfectly with the subject being imaged, particularly in optical systems such as cameras or projection systems. This misalignment causes different parts of the image to be in focus while others may vary in sharpness. As a result, the edges of the image can become blurry when the central part of the image remains sharp. When curvature of field occurs, the areas at the edges of the image are often less focused compared to the center, leading to undesirable softness and an overall lack of clarity. This blurriness at the edges can distract viewers and diminish the overall quality of the visual experience. The other choices refer to different negative visual effects. Hot spotting is more related to uneven brightness or intensity distribution in projection, cresting affects the quality of sound rather than visuals, and color shift involves changes in color representation rather than focus sharpness. These distinctions highlight why blurry edges, specifically attributed to the curvature of field, is the correct answer.