>>3994115I feel like the 8-16 is pretty much a bad joke, but most landscape zooms in that range are incompatible with screw-in filters
In the short run, the XF 50-140 mm + a 72 mm CPL is likely going to give you more value for money
In the long run, however, you UWA zoom will always feel crippled without filters
On the bright side, that will still leave you with 600 € for a full square filter set