I rented a medium format body for a recent brand campaign specifically to test whether the resolution and color depth genuinely justify the cost and workflow hassle for the kind of work I do, rather than assuming it would automatically be worth it because bigger sensors sound better. The answer turned out to be more situational than the gear forums usually admit.
Where the difference is genuinely obvious
For large-format print deliverables, billboard and large point-of-sale work specifically, the extra resolution and dynamic range showed up clearly, more recoverable detail in shadows, cleaner gradation in skin tones under studio lighting. If a client's deliverable is genuinely going to be viewed large and close, the difference is real and worth the hassle for that specific job.
Where it made almost no visible difference
For anything destined primarily for social and digital delivery, the difference between the medium format files and my usual full-frame body was essentially invisible once both were compressed and resized for actual delivery. I don't think a client or their audience would have noticed a swap on that category of work, and that's most of what I actually deliver day to day.
- Large print and billboard work: the resolution and dynamic range genuinely matter
- Social and digital delivery: the difference is largely invisible after compression
- Workflow overhead, file size and processing time, is real and worth factoring in
My actual conclusion
I'm not buying a medium format body, and I will rent one again for the specific subset of jobs where large-format print output is actually part of the deliverable, because that's the narrow case where the extra cost and slower workflow clearly pays for itself. For everything else, it would be an expensive answer to a problem my current kit doesn't actually have.