77mm Magnetic Variable ND2-ND32 (1-5 Stop) Lens Filters NO X Spot, NANO X Series

SKU: KF01.1853

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Il filtro ND K&F Concept 67mm ND2-ND32 è compatibile con tutti gli obiettivi della fotocamera che richiedono una filettatura Ø 67mm. Il copriobiettivo e il paraluce devono avere una filettatura più grande (ad es. 67 mm ND ha un copriobiettivo da 72 mm) 
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Hi, if you want put len cap , doesn't need remove the magnetic basic ring, thanks. 
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With this filter, I can reduce my shutter speed, even with a sunny day, so in my photos I get a blur motion background. Same thing with video, you can reduce the shutter speed so you will get more motion blur. It you consider for portrait, this filter don’t add blur background. For that you need a 2.8 or faster lens. I hope this help 
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Yes , this filter support to add other filter on it , such as Tiffen black pro-mist filter , or KF black soft filter , thanks. 
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No it does not. You have to place other filters inside/before this filter as I did on a recent trip to Yosemite. The fader worked great, however, in enabling me to shoot movement in flowing streams and waterfalls. I appreciated the filter's adjustability and I no longer have to carry a set of.3, .6, and .9 ND's around with me