Canon w swojej konstrukcji (5D Mark II) zabezpieczył sensor filtrem ze szkła fluorowego, który widać po podniesieniu lustra. Jest on prawdopodobnie lepiej dostępny dla serwisu niż we wcześniejszych modelach z uwagi na fakt, że to element zabezpieczenia więc sensowne jest wymienienie szkła zamiast matrycy. Sensor ma swój filtr LP, a przed nim jeszcze IR.
Nikt naprawdę nie wie gdzie taki filtr można dostać?
!!! Łączenie podwójnego wpisu !!!
"Split Anti-Aliasing Filter
Rather than introducing a separate cover glass into the optical chain, Canon has split the Canon 5D Mark II'S anti-aliasing filter into two parts. One element sits right above the sensor, while the other is positioned further away. It's this outer element that's vibrated during the cleaning cycle.
In describing the technology, Canon notes that the outer anti-aliasing element is positioned further from the sensor surface (a millimeter or so) than is normally the case. This greater distance reduces the effect of any dust that does adhere, by making the shadow cast by each dust particle larger and softer-edged.
Anti-Static Coating
Previous models in Canon's SLR lineup used an anti-static coating on the anti-alias filter to make it harder for dust to gain a foothold in the first place. Canon developed a new fluorine-based coating for the 50D, which purportedly improves this dust resistance property, and this new coating has been used in the 5D Mark II as well. Dust particles frequently carry static charges, so the anti-static coating avoids one of the key mechanisms by which dust particles adhere."
http://www.imaging-resource.com/PRODS/E5D2/E5D2A4.HTM
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