The semi silvered mirror would collect dust, and they're fairly fragile.
Mark Erickson wrote:
...use a pellicle-mirror design in their recent DSLR's? A Pellicle mirror design, which splits the light between the viewfinder and the CCD array rather than using a flip-up mirror, would yield the following features: the camera ISO would start at 100 rather than 200; the viewfinder would never darken; the camera should be quieter, more reliable, and consume less power due to fewer moving parts; and the CCD would be protected from dust by the pellicle mirror.
There must be a downside or two; otherwise such cameras would exist. Thoughts?
--Mark
--
I can understand why mankind hasn't given up war. During a war you get to drive tanks through the sides of buildings and shoot foreigners - two things that are usually frowned on during peacetime.
--P.J. O'Rourke
