http://en.wikipedia.org/wiki/Sony_Alpha_55
"Sony Î55 is a midrange-level camera, released in August 2010. It is a
breakthrough in camera design due to its being the first digital single-lens
translucent camera, (along with the Sony Î33). As an SLT, it features phase
detection auto focus ... due to usage of a half-mirror instead of a
standard, solid mirror. Because its translucent mirror does not have to flip
up to take a shot, the camera is able to take up to 10 frames per second
while continuously focusing"
Are Sony the only ones doing pellicle SLR's?
Answering my own question .. shoot me
http://en.wikipedia.org/wiki/Pellicle_mirror
"Canon models were produced with pellicle mirrors, the EOS RT and the EOS-1N
RS, the RT being based on the EOS 600/EOS 630 and the 1N RS being based on
the EOS-1N.
There are other potential uses for pellicle mirrors in modern cameras. One
is to use a pellicle to direct a portion of the incoming light to a fast
phase difference detection autofocus unit. There are patents in this area.
Sony introduced two dSLRs with this capability in August, 2010, though they
were not based on pellicle mirror, but rather a solid glass half mirror
which wasn't as thin and as lightweight as one used originally by Canon
