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Anonymous File :-(, x)
While its cons tend to outway it pros (light loss probably being its biggest drawback), its ease of speed, quietness, and constant viewfinder image make it a very enticing concept, especially to outdoors, sports, and photojourn shooters.
So, why no Pellicle mirror dSLRs?
I would think that certain "recent" digital advances could lessen its other flaws. For instance, internal sensor cleaning/shake techniques could be adapted to solve the mirror dust/cleaning problem. The fragile nature of digital sensors makes the Pellicle mirror's safety somewhat of a non-issue, because dSLR shooters already have to pay extra care when changing lenses, handling camera bodies, etc. Image fogging from the viewfinder could simply be solved by an included eyepeice cup, and cover (such what's already on high-end Nikon SLRs). And even the light loss problem is lessened with the advances in low-grain high-ISO speeds.
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