screw-in ND filter for E10-18?
I've used the Sony/Zeiss VF-62MPAM (5.5mm total depth) and VF-62CPAM (6.2mm total depth) on the SEL1018 with no vignetting by either. You can determine if the filter you want to use exceeds these measurements.
after i saw this picture i am starting to worry about for ND filter, this set of pic was taken with a very shitty ND400, the one i am looking at right now is similar to your CPL in terms of size, its bw ND110 (10 stops). it is just because of the shitty quality of the filter or it is always like this when you put a large stop of ND filter?