Fig. 8.

Camera responses to methanol leaf extracts. (A) Methanol (inset 1) and methanol leaf extracts (inset 2) were placed in blackened microtitre plate wells at a chlorophyll density of 121 ng mm⁻². Fluorescent photographs were taken with a Canon CMOS-containing camera with the filter cube containing a yellow dichroic barrier filter. Illumination intensity was 14 550 lx. (B) Nikon CCD-containing camera with the same filter cube used in (A) (chlorophyll at 158 ng μL⁻¹, 20 000 lx). Both cameras were set with an ISO of 800 and an aperture of 8.0. Exposure times ranged from 0.001 to 1.25 s. Counts observed from the dilution buffer (90 % methanol) were subtracted from the fluorescent pigment measurements.