Sony FE 100-400mm f/4.5 G Master Review: Is the Constant Aperture Worth the Price? (opens in new tab)

Sony's constant f/4.5 telephoto zoom delivers nearly instantaneous autofocus and exceptional bokeh, but the $4,300 price tag demands perfection. Frost's optical testing reveals strong sharpness and minimal distortion, though longitudinal chromatic aberration at f/4.5 is a notable trade-off.