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Balloon-borne astronomy is unique in that it allows for a level of imagestability, resolution, and optical backgrounds that are comparable tospace-borne systems due to greatly reduced atmospheric interference, but at afraction of the cost and over a significantly reduced development time-scale.Instruments operating within visible-to-near-UV bands ($300$ - $900$ um) canachieve a theoretical diffraction limited resolution of $0.01"$ from thestratosphere ($35$ - $40$ km altitude) without the need for extensive adaptiveoptical systems required by ground-based systems. The {\it SuperpressureBalloon-borne Imaging Telescope} ("SuperBIT") is a wide-field imager designedto achieve 0.02$"$ stability over a 0.5$^\circ$ field-of-view, for deep singleexposures of up to 5 minutes. SuperBIT is thus well-suited for manyastronomical observations, from solar or extrasolar planetary observations, toresolved stellar populations and distant galaxies (whether to study theirmorphology, evolution, or gravitational lensing by foreground mass). We reportSuperBIT's design and implementation, emphasizing its two-stage real-timestabilization: telescope stability to $1$ - $2"$ at the telescope level (a goalsurpassed during a test flight in September 2015) and image stability down to$0.02"$ via an actuated tip-tilt mirror in the optical path (to be testedduring a flight in 2016). The project is progressing toward a fullyoperational, three month flight from New Zealand by 2018

The design and development of a high-resolution visible-to-near-UV telescope for balloon-borne astronomy: SuperBIT