My best images of wolffia were taken with the Bausch & Lomb microscope (left) and a Nikon FM-2 using Kodochrome 64 color transparency film (circa 1980). The red arrow points to a tiny glass bowl of Wolffia globosa with some larger duckweeds (Lemna turionifera). Substage illumination was fluorescent and top lighting was incandescent. No filters were used in the original film images. The colors may not have been true, but they certainly look good in scanned images. The last 5 images on this page were taken with a Nikon D-90 digital SLR. White balance was set to "Auto" on images 1 & 2, and "Incandescent" on images 3 and 4. Image 5 was set to "Direct Sunlight." It is difficult to say which setting is best, perhaps "Auto." The wolffia are transparent green with a speckled, slightly yellowish tinge. With digital SLRs the white balance needs to be carefully corrected to acheive a reasonably accurate color match. This is a time-consuming process.