Information of the product : 

* Low Pass Filter Modification for astro-photography
* Original Canon’s Anti-Aliasing filter Preserved
* Original Canon’s Dust reduction function Preserved
* Finely aligned AF Focusing for Daytime use
* Excellent light transmission characteristic.(420nm ~ 680nm)
* H-a light 98% pass (unmodified camera: 27%)
＊1 year CentralDS warranty included
＊Delivery : 2 weeks.