We discuss the design, realization, and characterization of a miniaturized focus-tunable camera objective featuring a gravity-neutral, liquid-tunable aspherical lens and compare its performance to an equivalent system optimized for a conventional tunable lens. In addition to the innovative component, the objective design features three fixed elements and an aperture, which are all assembled to form a
system. With an image sensor size of 3 mm, the objective provides a viewing angle of 40 deg. By tuning the lens in its gravity-neutral range, the object distance can be shifted from 5 mm to infinity, with image-side cutoff frequency remaining above
across the entire range. Through ray-tracing simulations and experimental results, we demonstrate that for optical trains of identical complexity, tunable aspherical lenses provide substantially better imaging quality over the object distance range of interest, compared to conventional, spherical tunable lenses.