MASTER LIGHT WITH VARIABLE EXPOSURE REDUCTION, CONTROL THE LIGHT AND ELEVATEYOUR PHOTOGRAPHY GAMEThe K&F Variable ND filter gives you additional control over your exposure. Thisallows you to blur movement or decrease depth of field, normally impossible inthe bright harsh light of day. It can restrict the amount of light entering thecamera allowing you more choice in your preferred settings. Now you are able toshoot with longer exposure times or wider apertures under bright conditions. Forvideo work it acts like an additional aperture control. A Variable ND differsfrom a normal ND filter in that you can control the amount of light reductionsimply by rotating the filter to increase or decrease the amount of lightentering the lens.A Variable Neutral Density Filter is like a pair of sunglasses for your lens. Apair of sunglasses that you can adjust like a volume knob to control the amountof light they let through. Cameras have three ways to control exposure,aperture, shutter speed, and ISO. This filter effectively becomes a fourthcontrol tool to manipulate light exposure. It controls the amount of light thatenters your lens by opposing two polarised filters. Rotating one creates adarkening effect, which ranges in influence from 1 to 9 f-stops of lightreduction. By reducing the amount of light entering the lens and sensor, aphotographer can create several awesome visual image effects. These effectswould not be possible in bright light conditions without a variable ND. Simplyadding the filter to the lens gains you your first f-stop reduction of light. Ifyou have ever visited a beach, desert or salt flats you will know how much youappreciated having sunglasses with you. Under those extreme lighting conditionsyou camera sits with all its exposure controlling settings topped out. Theamount of artistic control you can take becomes limited by the restriction ofall values being maxed. Adding dialable "sunglasses" to your camera reopenscreative possibilities.The Nano-X Series of FiltersK&F Concept's Nano-X Series of filters are crafted for the demands of UHDcapture. When you want 8k resolutions, use a filter that is designed foruncompromising quality. The filter is crafted from high precision Japaneseoptical glass. The lens is treated with a double-sided polishing process whichensures high-definition image quality at up to 8k. The filter also undergoes adouble-sided multilayer coating process where 28 layers is applied to the lens.Coatings effectively reduce reflections, increase effective light transmittancethrough the filter and avoids ghosting. The outer layer coating is hydrophobicto help repel water and are scratch resistant ensuring the longevity of yourfilter. The filter glass is larger than the threaded mount to further helpreduce vignetting, even when using a wide-angle lens. It also helps give afilter effect which is consistent over the entire frame.The dark XThrough the polarisation mechanic used by Variable ND filters it is possible toform a dark X cross shape across the frame when dialled in at the extreme limitof the darkening effect. This is caused through a combination of focal length,lens type and the natural mechanical physics of cross polarization. This is nota filter quality problem, it is an inevitable byproduct which can occur underspecific conditions. It is easily corrected by rotating the outer filter ringaway from the zone where that effect is evident. If your specific needs are fora Variable ND filter free of the dark X cross, consider the K&F ND8-ND128 whichis a 3-7 stop filter and is free of this effect.Utilizing a Variable ND filter like this K&F model offers several advantages forphotographers and videographers. By slowing the shutter and extending exposuretimes, you can achieve a captivating motion blur effect, effectively contrastingstatic and moving subjects in your images. Additionally, the filter allows for ashallow depth of field, enabling the isolation of the main subject with a softblur in the background. For videographers, the Variable ND filter providesconvenient aperture control, often absent in many lenses. This feature provesvaluable for achieving a cinematic style in video creation. Moreover, thefilter's versatility streamlines gear and minimizes time spent swapping filters,making it an ideal all-in-one solution for photographers on the go.The K&F Variable ND Filter has a smart ultra slim frame design machined from thebest quality aircraft aluminium. This ensures the frame is strong, durable andalso very lightweight. It will stand up to continuous use, day in and day out.The textured frame helps to add extra grip to the surface. This model has arotation tab which gives you extra leverage and control over the rotation of theouter filter ring. You can screw it on securely with less risk of accidentallydropping the filter and you can rotate it more easily to dial in the value youafter. The smooth action allowing perfect light reduction between 1 and 9f-stops. There are no hard stops, so you can intuitively dial in the darkeningeffect with your eye. You will also find handy dot and arrow calibration marksto help make results repeatable. The frame is double threaded so you can combinethe effects of more than one filter type, allowing you to adapt the mood andatmosphere to fit any occasion or condition.A PU leather case for your filter is included in the kit. The pouch has amagnetic flip cover. Lifting the cover reveals a fabric pull tab for simple andquick access to your filter. Pull the orange tab to safely lift the filter fromits case without touching the glass. A great filter is worth protecting.Screwing this variable ND filter on the front of your lens will help youmanipulate and control the amount of light that enters your lens and sensor.With the K&F Variable ND Filter in front of your lens, you have a world ofcreative possibilities at your fingertips. From motion blur effects to shallowdepth of field, you can do it all with the K&F Variable ND Filter. It's got youcovered from 1-9 f-stops. So, if you are trying to streamline the amount of gearyou carry to your shooting location or just need a great all-rounder ND, buy theK&F Variable ND Filter from the Nano-X series. As with all K&F products, theprice will put a smile on your face.Specifications- 1-9 f-stop Variable Neutral Density Filter- Filter density: 0.3 to 2.7, ND2 - ND400- Aluminium Alloy frame with rotation tab- Japanese AGC Optical Glass- Multiple lens coatings (28 Layers)- 7.4 mm frame double threaded- Series: Nano-X