It started as a happy moment: screwing my new 3nm Chroma filters into the EFW mini. Then I noticed those filters are quite thick compared to the ZWO LRGB. My palms grew sweaty and I was already thinking of ways to explain another purchase to the CFO, after this unexplainable one (that much money for three small pieces of glass?!).
Fortunately, they slided in without a sound. I don't know how much distance is left, but it can't be much. I hope it does not contract too much in the cold, or I may need a dew heater for the filter wheel.
Are all filter wheels this tight? Is it the 3nm filter or is it the EFW-mini?