SUMMARY
A methodical video comparison by Pit Haupert tests full frame against APS-C sensors, finding that lens choice and equivalence significantly impact image quality. While full frame offers better low-light performance at matched settings, using brighter APS-C lenses can largely close the gap. Haupert demonstrates that comparable background blur and resolution can be achieved by adjusting for equivalent focal lengths and apertures, suggesting equivalence is a more practical consideration than abstract sensor size debates.
TAKEAWAYS
Equivalence in focal length and aperture can make APS-C systems perform comparably to full frame.
APS-C systems can match full frame low-light performance with brighter lenses.
The 'aperture ceiling' on APS-C requires extremely fast lenses to match full frame.
APS-C lenses designed for equivalence can sometimes be heavier than full frame counterparts.