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Mirek Elsner wrote:
Can anybody help me understand differences between their different filters? And are they worth the premium over B+W KSM and other brands?
Their best line is the SH-PMC (multi coated) High Transmission. They are among the best you can buy with excellent build quality as well as optical quality. You'll find several other brands that will also be excellent, but I do like my Heliopan filters.