http://en.leica-camera.com/World-of...ws/Global/2015/Latest-information-CCD-sensors Leica has announced that a new sensor is in test, will be available soon. I suspect it is a revised KAF-18500 with an improved cover for the glass. I'm sure details will follow. ONSEMI Updated the Data Sheet for the KAF-18500 back in March, and Lead Times were longer than. I suspected something had to be around the corner. This is the old part-number... kaf-18500-nxa-jh-aa-08 A new Part-Number shows up in the search on the site, but a data sheet is not available... kaf-18500-fxa-jh-aa-bg55 "BG55" is a Schott IR cover glass, the original glass was S8612. SO- I believe that ONSEMI has replaced the S8612 cover glass with BG55 cover glass. http://www.schott.com/advanced_optics/english/download/schott-bandpass-bg55-dec-2014-en.pdf S8612: http://www.schott.com/advanced_optics/english/download/schott-bandpass-s-8612-dec-2014-en.pdf An older version of the S8612 data sheet. http://www.howardglass.com/pdf/s_8612_datasheet.pdf The older Datasheet shows "2 Exclamations" for the warning, the new one shows "1 umbrella". I've also seen it with a "Double Umbrella".