Just wondering if most use a UV/IR filter for their QHY128C (or QHY367C) cameras. I use my QHY128C on my FSQ106ED ; using the QHY 20055  2"  filter holder with the UV/IR filter close to the chip window I get a significant halo effect not correctable with flats.  Should I just not use the filter or should it be positioned further away from the camera? 
Any thoughts?   Thanks,  Knox W