There is one set of 125mm diameter filters for use with the WHT prime focus filter wheel - Harris B,V,R, 4mm RG9 for the I, 4mm RG850 for the Z, one U filter of 1mm UG1+3mm BG39 (low throughput, not recommended) one narrow band H alpha, one narrow band OIII
Following table is NOT updated.
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Table: Summary of 125 mm filters for CCD imaging