Negative Positive
Title: watch out for tiffen filters
Review: There is an excellent scientific review on a polish website, Lenstips, testing 17 different UV filters, using both a spectrometer and photographic tests. This Tiffen filter is bottom of the 17 tested - it has virtually no impact on UV radiation and actually reduces light transmission by 3% on some wavelengths - not only is it a waste of money, it reduces image quality. On my Pentax lens, images tend to be over-exposed and of lower contrast. Draw your own conclusions.
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