The 37mm Nano-X Pro MCUV HD Green Multicoated Filter from K&F Concept is a clear filter designed to absorb ultraviolet light and reduce the bluish cast of daylight, with no additional coloration or contrast. No adjustments to exposure are required while using this filter, which screws directly onto any lens with a 37mm front filter thread.

Made of Schott B270 optical glass for highly accurate image and light transmission, this filter features multicoating to reduce ghosting and lens flare, plus a water- and scratch-resistant nano-coating for protection in harsh environments.

Clear Protective Filter    Absorbs Ultraviolet Light    Prevents Damage to Lens    1x Filter Factor, +0 Stop    No Effect on Image    Green Multicoating Reduces Lens Flare    Protective Nano-Coating    Waterproof Construction    Schott B270 Glass

Related Questions and Answers

Q: 1. I just bought this filter and I experience something weird. When I turn it over the darker ND dot, the filter seems to go even darker and the photo look like a IR shot (all purple). Yesterday I set the filter at his darker point. I took a photo : f.14, 2.5s, iso 100. Then I turn further the filter and it became darker. So I change the time and I hand to go further as 60sec to get proper expose photo.. but in the viewfinder, it was all purple. Is that normal? I use it on Olympus em10II and 14-42 kit lens

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (58mm) is only rated to perform properly till 8.6 stops. Going beyond the specified maximum may degrade image quality. Additionally with higher levels of light reduction one runs the risk of IR pollution in the image. As you reduce visible light you are more suspect to this pollution, which could be why you are seeing the strange colors.

Q: 2. Doesn't the blue coating affect the hue of the picture? Is there a blue tint?

A: The blue coating on this filter has no negative effects in terms of the hue in your images.

Q: 3. Will this work with the Sony A7SIII?

A: This filter will work with any lens with a 67mm thread.

Q: 4. does it have a 67mm filter thread to stack another filter on top of it?

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (67mm) will be able hold another filter on top of it, the size of the filter to mount is 72MM.

Q: 5. Are the filters glass? or acrylic/plastic?

A: The filters on the K&F Concept Variable Fader ND2-ND400 Filter are made of glass.

Q: 6. The filter factor is not listed here. On the K&F website, it is listed as 1.3 stops. You're welcome?

A: The K&F Concept Nano-X Pro High Definition Circular Polarizing Filter (${Size}) does have a filter factor of 1.3 stops.

Q: 7. Is there a lens cap for K&F Concept Variable Fader ND2-ND400 Filter (49mm)?

A: The back of the filter is 49mm but the front is 52mm so you can use this 52mm lens cap on it. https://www.bhphotovideo.com/c/product/807037-REG/Sensei_lc52_52mm_Center_Pinch_Snap_On.html

Q: 8. Will my lens cap fit on this filter? The lens is a Lumix 12-35 micro 4/3.

A: The front thread for this K&F Concept Variable Fader ND2-ND400 Filter (58mm) would actually be 62mm, so your current cap will not fit.

Q: 9. What does the "green" do?

A: The K&F Concept Nano-X ND2-ND32 Green Multicoated Variable ND Filter's coating is used to neutralize color temperature deviations that occur under certain lighting conditions. This helps with color balance, reducing light loss, and managing reflections that would affect the contrast of the overall image.

Q: 10. Can you please confirm this will fit on the Tamron 17-28 f/2.8 Di III RXD lens. Will the 72mm front thread accept a 2nd filter?

A: The Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E has 67mm front focus threads. As such, the K&F Concept Variable Fader ND2-ND400 Filter (67mm) would be compatible to fit the front filter threads on the Tamron 17-28mm lens. A 72mm filter would not directly fit on the front of the Tamron 17-28mm lens without the use of a step-up ring such as the Sensei 67-72mm Aluminum Step-Up Ring, B&H # SESUR6772.