We have a Sony A7 IV converted to full spectrum for UV photography (filter removed with no replacement). We have the set-up for UV photography fine (Nikkor enlarging lens etc), but we also wished to use the camera in the visible range. However, when we use a normal lens on the camera for visible photography with a Hoya \”UV and IR cut\” filter, it looks like not all of the IR is being cut out. Is there a better front of lens filter to achieve our purpose? Or anything else we can do?