Is that a black hole in @kevinabundy's hand? No, it's the FOBOS UV channel... That little filter he's holding passes only UV light, 300-400 nm. FOBOS will see at UV and near-IR wavelengths that are totally dark to human eyes.
In the LSST era, we'll have target densities of 40 per sq. arcmin all over the sky (r~25). FOBOS targeting averages 6 per sq. arcmin. This lets us "resolve" galaxy environments and build deep samples with high efficiency... (PFS gets 0.6 per sq. arcmin and DESI gets 0.2)
We're recruiting science ideas to build on the FOBOS #Astro2020 white paper (https://t.co/qhfcYjefn7). 1800 fibers, 0.31-1 um, R~3500, IFU modes, and DEEP! A next generation facility for @keckobservatory.