  Wavefront sensing and control are important for enabling one of the key
advantages of using large apertures, namely higher angular resolutions. Pyramid
wavefront sensors are becoming commonplace in new instrument designs owing to
their superior sensitivity. However, one remaining roadblock to their
widespread use is the fabrication of the pyramidal optic. This complex optic is
challenging to fabricate due to the pyramid tip, where four planes need to
intersect in a single point. Thus far, only a handful of these have been
produced due to the low yields and long lead times. To address this, we present
an alternative implementation of the pyramid wavefront sensor that relies on
two roof prisms instead. Such prisms are easy and inexpensive to source. We
demonstrate the successful operation of the roof prism pyramid wavefront sensor
on a 8-m class telescope, at visible and near infrared wavelengths ---for the
first time using a SAPHIRA HgCdTe detector without modulation for a laboratory
demonstration---, and elucidate how this sensor can be used more widely on
wavefront control test benches and instruments.
