Last month, we posted of Sigma announcing the world's first protective lens made of clear glass ceramic. We finally have pricing of how much these filters will cost. B&H Photo and Adorama has posted the entire line of the Sigma ceramic filters. The filters range from $93 for the 67mm, up to $315 for the 105mm. All of the filters are available for preorder.
Check out the video of the drop ball test:
