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To be honest I go out 5-6 days a week in dusty conditions in all kinds of weather and typically only clean my front elements a few times a year and use a rocket blower between cleanings. It’s really just a matter of choice but with at least with a few lenses I’ve tried them on, they are just not worth it.
Steve doesn't recommend the use of UV filters, but notes that in his testing, any loss of sharpness and clarity in minimal. He also notes that there can be unwanted flare and ghosting under certain lighting conditions.
