WB850F update

Here is a brief hands-on review of the WB 850F. I'm wondering what the knurled ring at the base of the lens is used for. Also will the camera ever reach the stores, I am still waiting to see the 700/750. One error in the test, they say the WB750 has a CCD sensor not a BSI CMOS.

http://www.digitalcamerainfo.com/content/Samsung-WB850F-First-Impressions-Review/comments.htm
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Mike