You can use an IR filter with any digital camera to create IR images, regardless of whether it's been converted or not. The problem is most digital cameras have an internal IR blocking filter, so the two filters work against each other and very long exposures are the result. With a converted camera the IR blocking filter is replaced so exposure times aren't much different. For that type of camera live view is handy to have. Unlike the Olympus feature it doesn't work for long exposures, but it does cause the camera to expose and focus from what the sensor is seeing, instead of what the mirror is seeing. That's why I had the D5000 converted, rather than an older Nikon body that doesn't have the live view feature.