Fahim, According to the datasheet:
http://www.kodak.com/global/plugins/...50LongSpec.pdf
it's 5.5 microns, very close to the ICX098 used in the ToUcam and DMK21AF04 cameras.
However it has a quad-port readout, so the ccd is read out in 4 parallel channels, making it very fast to read out the data. This has been the main limitation of large format ccds for planetary work in the past - they were too slow.
The KAI-0340DM in the Dragonfly Express is a dual-port ccd, so I guess this is the next logical step.
In quad-port mode the KAI-02050 ccd can hit 68fps for full-frame data (1600x1200). Not too bad.
cheers, Bird