37mm ND2-ND32 (1-5 Stop) Variable ND Filter and CPL Circular Polarizing Filter 2 in 1 for Camera Lens Nano-Xcel Series

SKU: KF01.2047

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Hi, this ND filter has 5 stops from 1-5 , thanks. 
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The Olympus 100-400mm IS lens size is 72mm, please reconfirm the number mark as "ø" (diameter) symbol, if the number is 72, just need to order same 72mm size filter ,thanks. 
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Hi, in wide-angle lens if on the most darkness stop , suggesting focus length is 20-24 for avoiding vignetting. 
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50 mm Yongnuo lens filter size is 58mm, you can reconfirm your lens mark as "ø" (diameter) symbol, if the number is 58mm, it would be ok ,thanks.