Molecular Probes

Excellent source of information for fluorescent microscopy including absorption/emission spectra etc

Carl Zeiss Cellscience Interactive Fluorescence Database

Handy tool lets you superimpose graphical fluorochrome data from various fluorochromes

Chroma Technology

Manufacturer of optical filters and filter sets; plus useful info

Nikon MicroscopyU pages

Educational forum for all aspects of optical microscopy, digital imaging, and photomicrography

Digital Imaging Tutorial

Useful tutorial on the Cornell University website