User-changeable fluorescence optics modules have been added to the Cellometer® Vision automated imaging cell counter and analyzer. Designed for laboratories that routinely work with cells tagged with a large variety of fluorescent labels, the new Cellometer Vision allows users to change out either of the two fluorescence optics modules in the instrument and replace it with another one. This enables scientists to perform experiments using their choice of fluorescent labels, with a broad spectrum of excitation and emission wavelengths from ultraviolet to red.