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Unlike CCD video cameras, most digital cameras have an integrated optics. In combination with the optics of the LM Digital Adapter the digital camera´s chip is fully illuminated when the zoom is adjusted correctly.
Some producers have integrated a  preliminary optical lens system in the C-Mount of their microscopes. The C-Mount connection has originally been designed for CCD video cameras without integrated optics. The function of this lens system is to project directly a temporary picture onto the chip of the video camera through using the integrated C-Mount optics.
Depending on the size of the CCD chips there are being offered different C-Mount lenses like e.g. C-Mount Adapter 1x, C-Mount Adapter 0,63x, C-Mount Adapter 0,50x or C-Mount Adapter 0,35x in order to illuminate perfectly the different video chips with the dimensions of 1”, 2/3”, ½” or 1/3”. 
These C-Mount optics cause interferences when being used with digital cameras or camcorders in combination with all types of LM Digital Adapters and therefore must be removed. Otherwise they might cause a strong circular vignetting effect.

                        1"                            1/2 "                     1/3 "

The integrated optics of the microscope´s C-Mount connection is normally used for the adjustment of the CCD video camera. The reduction factor (0,63x, 0,5x, 0,35x) depends on the chip size. 
Such C-Mounts with integrated optics are therefore not suitable for the connection of digital cameras and must be replaced by C-Mounts without integrated optics (1x C-Mount)

Using the optimal combination of C-Mount Adapter 1x without integrated optics,together with our LM Digital Adapter and a Nikon Coolpix, you will obtain a perfect, rectangularly illuminated digital camera´s chip.