Which camera feature corrects for the quality of the photographer's eye?

The diopter adjustment is a crucial feature that allows photographers to fine-tune the viewfinder's focus to match their individual vision needs. This compensation is particularly beneficial for individuals who may have minor vision impairments or who require corrective lenses. By adjusting the diopter, photographers ensure that what they see through the viewfinder is sharp and clear, directly impacting their ability to compose and capture images accurately. This adjustment helps correct for variations in the photographer's eyesight and supports better focus on their subjects, making it an essential feature for anyone shooting with a camera that has a viewfinder.

In contrast, viewfinder magnification enhances the size of the image seen through the viewfinder, optical zoom adjusts the focal length of the lens for varying distances, and focus peaking aids in manual focus by highlighting areas in sharp focus. While these features improve the shooting experience, they do not specifically address the correction of the photographer's eyesight.