Join Date: Apr 2000
Location: Ottawa, Ontario, Canada
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No, I'm afraid an ND filter will not give you the benefits of a Greyhawk. All it really does is cut your brightness, which you don't really need to do (after all you're paying for those lumens!). The Greyhawk also cuts your screen brightness a bit, but it has other benefits. Even in a light controlled room without ambient light, the Greyhawk will still give you more than an ND filter. The Greyscreen increases your dynamic contrast ratio because it absorbs some of the light reflected back from your room (unless you have black walls, ceiling) and the optical coating rejects light reflected from the ceiling and floor. This also serves to increase your colour saturation because you don't have as much light from the room to wash out bright colours.