If it is anything like the M48 filter I use then no, they are often designed so you could stack filters but my ZWO M48 filter has about 1mm of female thread before you hit the lock ring, when I first tried it out I had my OAG and camera hanging off it but it was a tense sort of night hanging a kilo or more of 1 turn of thread. Once I was sure it was going to work I had the adapter that fits my reducer to the focuser drawtube remachined to put the filter in front of the reducer inside the drawtube.
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