I have a question. I bought Voitlanger 40 mm f / 1.4 to filter Leica E43 UV / IR. Do you recommend to enable the Leica M8 menu function "on + uv / ir" or better left to the "off"? Voitlanger of course, is not encoded. I have the impression that the pictures from the "off" are more greenish than with "a + uv / ir." How do you have at home? Does it also affect the sharpness of jpg files is?