CSS3: opacity vs filter opacity?
I was playing with the CSS3 filter functions (blur, contrast, invert, etc.), and noticed there is an opacity function: filter: opacity(0.5); -webkit-filter: opacity(0.5); -moz-filter: opacity(0.5); While we already have: opacity: 0.5; If we apply both of them for a HTML element, it seems like it's getting double effect! Now that makes me wonder, is there any difference? EDIT: I'm not asking about the old IE filter: alpha(opacity=50) as that is Microsoft's implementation. I'm asking about the CSS3 filter vs CSS3 opacity ? @bram-vanroy posted this same question already, basically. I thought this