Radial profile (red points) of a deep (300 s) MagAO Y _short (0.98 μm) PSF on a bright ( V = 5 mag) star closed-loop at 990 Hz with 250 modes in 0 6 V band seeing (from J. R. Males et al. 2013, in preparation). Inset: a log10 Stretch of the PSF. There was no post-detection processing of any of the data (no SAA, no Lucky imaging, or frame selection applied). The theoretical MagAO PSF profile as imaged by the E2V CCD47 (Strehl 100%). A detailed comparison of the observed PSF to theory with our CCD47 (including dark current and PRF) shows that we reached a Strehl of 43% or 140 nm rms optical wavefront error.