[TareqPhoto (Tareq)]

Originally Posted by JA

The problem I explained will still exist.

The light passing through the optics BEFORE the Luminance filter is full bandwidth light and as described previously the optics will still (depending on the quality/degree of apochromaticity) focus it at different focal points as a function of wavelngth (colour). This then passes through the Luminance L filter and is limited to a 400-700nm 50% bandwidth. Simply put it will appear to create a slightly defocused/smeared image as a result of the widebandwidth of light transmitted IRRESPECTIVE of whether a colour or monochrome sensor is used. It may help to recall that the monochrome sensor will still receive all the light passing through the Luminance filter in the ~400-700nm band and therefore display all the optic's potential faults, in a comaprison with a much easier job in the narrowband case.


Best
JA

Ok, got it, thank you!