The latest version of Camera Raw will work with Photoshop CS6. However, new features such as the brush for the gradual filter or radial filter will not be available. You will have all the features that were available when using Camera Raw with Photoshop CS6, but will only have updates that will include support for new cameras. New features will not be supported. Older versions of Photoshop are only compatible with versions of Camera Raw that were designed for that version. For instance Photoshop CS4 will only work with Camera Raw versions 5.x.