What happens to shutter speed if you decrease aperture (increase f-stop)?

When you decrease the aperture by increasing the f-stop number, you are allowing less light to enter the camera. Since there is less light available to properly expose the image, the camera compensates for this reduced light by adjusting the shutter speed.

To achieve a correct exposure, the shutter speed must become slower, allowing more time for the sensor to capture light. This interplay is essential in the exposure triangle, where aperture, shutter speed, and ISO work together to determine the amount of light that reaches the sensor. Thus, as the f-stop increases, the shutter speed must decrease to allow for adequate light capture.