Yes. What you want is exposure compensation in post-processing, not changing the original capture EV.

A key point: EV describes the camera settings used to make an exposure (aperture, shutter speed, and ISO reference), not an absolute brightness of the final image. So you can’t really assign a new capture EV to an already-shot photo, but you can make it look like it was under- or overexposed by adjusting exposure in stops.

On Mac, a raw editor such as RawTherapee can do this. If you prefer command-line tools, ImageMagick-based exposure tools can also generate darker and brighter variants.

For your set, create copies of the base image and apply exposure adjustments of:

• -4 stops
• -2 stops
• 0
• +2 stops
• +4 stops

This works best from a RAW file, since RAW gives more latitude for recovering highlights and shadows. With JPEGs, large adjustments like ±4 stops may look noisy, clipped, or unnatural.