[Leica] New lenses and S2

[wildlightphoto at earthlink.net (Doug Herr)]

Frank Filippone wrote:

>However, the other (Leica) spin was that it improved image quality compared
>to not have the filter..... which is theoretically true, so why, on a reflex
>camera that is trying to be the worlds' best, include the filter?

Why would a reflex camera not include the filter, unless you want infrared 
to influence the photos?

>If you wish to produce the very best, why bother with an element that has
>negative effect on the image, that could be left off?

To limit the recorded spectrum to the visible range, i.e., to produce 
accurate colors and record only those wavelenghts the lens is corrected for.