  The focal plane camera is the core component of the imaging air Cherenkov
telescopes. Because of the capability of working under moonlight without aging,
silicon photomultipliers (SiPM) have been proved to be not only an alternative
but also an improvement to conventional photomultiplier tubes (PMT) in this
application. Eight SiPM-based cameras with square light funnels have been built
for the Wide Field of view Cherenkov/fluorescence Telescope Array (WFCTA) of
the Large High-Altitude Air Shower Observatory (LHAASO). The telescopes have
collected more than 50 million cosmic ray events and preliminary results
indicate that these cameras are capable of working under moonlight and have
achieved a duty cycle of about 30%. However, the characteristics of the light
funnels and SiPMs also pose challenges (e.g. dynamic range, dark count rate,
assembly techniques). In this paper, we present the design features,
manufacturing techniques and performances of these cameras. Finally, the test
facilities, the test methods and results for all 8192 SiPMs in the cameras are
reported here.
