#3. "RE: Can an IR Filter Damage my D5000 without converting?" In response to In response to 2
Spring Hill, US
I'm not an expert on IR camera conversions, but...
It sounds like you're able to see 'near' infrared through the filters. Think of it as a gap. The Hoya IR bandpass filter allows a IR light to pass, including what is usually called 'near' or high frequency IR light. The camera's IR filter filters out all IR light, but allows a tiny sliver of light at that same near infrared frequency to pass to prevent the camera from blocking deep reds.
There is probably an overlap where the two filters allow light, and that may be what you're seeing. The IR remote is at a lower frequency than the camera's IR block, so you don't see it.