Can I use a planachromat objective in reflected light fluorescence?
Planachromats may serve satisfactorily for blue or green excitation wavelengths, but the planachromat’s glass elements may themselves fluoresce in excitation in the near ultraviolet. Also, planachromats, for their respective magnifications, have a lower NA than do planfluorites or planapochromats, so you could get a dimmer image.
