This is not possible in the Nu-View as supplied. The net results is the spectrum as viewed or recorded via the Nu-View spectrometer appear very soft and of poor resolution. In reality the captured image is greatly oversampled for the Nu-View does not give an instant results. These must be extracted via the supplied software later. Bright emission lines can be seen in the spectra of fluorescent lamps, tv or computer monitors and mercury and sodium street lights.
Tungsten lamps show just a colourful band of colour called the continuum.
Daylight through a window will show a similar continuum but crossed with numerous dark lines originating in the sun's atmosphere in reflected daylight. Because of the relatively high spectral dispersion of the nu-View only a small portion of the whole spectrum can be viewed at one time. Turning the micrometer screw on the side of the spectroscope brings other parts of the spectrum into view. The visual spectrum extends from about 390nm in violet to about 700nm in far red and a common focus holds throughout the range. Sivo supply as standard a 50mm focal length exit lens.