  We explore the use of inexpensive consumer light- field camera technology for
the purpose of light-field mi- croscopy. Our experiments are based on the Lytro
(first gen- eration) camera. Unfortunately, the optical systems of the Lytro
and those of microscopes are not compatible, lead- ing to a loss of light-field
information due to angular and spatial vignetting when directly recording
microscopic pic- tures. We therefore consider an adaptation of the Lytro op-
tical system. We demonstrate that using the Lytro directly as an oc- ular
replacement, leads to unacceptable spatial vignetting. However, we also found a
setting that allows the use of the Lytro camera in a virtual imaging mode which
prevents the information loss to a large extent. We analyze the new vir- tual
imaging mode and use it in two different setups for im- plementing light-field
microscopy using a Lytro camera. As a practical result, we show that the camera
can be used for low magnification work, as e.g. common in quality control,
surface characterization, etc. We achieve a maximum spa- tial resolution of
about 6.25{\mu}m, albeit at a limited SNR for the side views.
