corazon
Established
hou baloo said:The Series x holders I have seen are actually two halves that screw together and hold between them an unthreaded glass filter. I have a couple of different Series VI holders for 40.5mm etc., but on any of them you can unscrew the two halves, insert a filter, and screw them back together. So for example, the 48mm->Series VI adapter mentioned above just means that the back business end of the holder is threaded for 48mm. The comment about "up to xx mm" reflects the fact that there is some latitude in what size filters the holder will hold.
Ah, okay, so the glass filter inbetween cannot be threaded. But where to find threadless round filters?