I purchased a filter holder that flips up and away that holds my ND filters instead of screwing them in and out directly from the lens - which (as we all know) leads to 'not-so-perfect' focus on some long-exposure shots. so - attached them to my 24-70 screwed in to my M50 and took a couple shots down at our local inland man-made lake (aka LaFarge Lake) - 30 sec at f8 :)
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