[Features] · A holder for setting filters with diameters of ø15 mm or ø20 mm. · The optical axis height is standardized at 25 mm from the bottom. · Can be fitted with two filters. · Fix by loosening the clamp and sliding the holding part backwards or forwards in line with the thickness of the filter. · Filters with a thickness of up to 4 mm are supported. · The bottom plate features an M4 tapped hole. Mount a rod to change to a rod type. · The F561-20 can also be used as a simplified polarizing element holder by directly turning the element.
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