This filter is made of VERY high-quality material, which you can tell from the moment you pick it up. It doesn't create an X effect, as it has a cap at both ends, and there's no color cast. I've tested it on several lenses; on a 16mm lens, it creates a slight amount of vignetting, which can be corrected in post-production. If you zoom in at 18mm, it disappears. A good buy, highly recommended.

A bit expensive filter, but with excellent optical performance. It does not present some defects common to this type of filter, such as color changes and non-uniform darkening. Quite satisfied.

This filter is beautifully crafted, and unlike many cheaper variable ND filters, the illumination is extremely even across the entire image from the brightest to the darkest setting. There are none of the strange bright and dark areas you get with many variable ND filters.

The scale can be adjusted over a range of four stops to give you exposure reduction between 1 and 5 stops. In my testing, I found it to be a little less than 5 stops at most, but it's pretty close. This allows you to open the aperture wider to get a shallower depth of field without having to change the shutter speed, which is especially useful when shooting video. For example, if you needed to shoot at f/16 to get a correct exposure without a filter, you could achieve the same exposure by shooting at around f/2.8 with the filter attached and at the darkest setting.

In my tests, I didn't notice any color cast from the filter, and the clarity of the glass is exceptionally good, so I'm not worried about any loss of sharpness.

It's pretty close to being the perfect ND filter.

TIP: If you need to use a filter on multiple lenses with different filter diameters, simply buy the filter with the maximum diameter you need and then use it with step-up rings on the smaller-diameter lenses. This is much cheaper than buying a filter for each lens diameter.

✍️ Verdict

A review of -

What the device can do and what it is for will not be written here, because the function and what it is used for are clear in advance.

Otherwise, you wouldn't be looking for it.

With this product, you have to talk about the price/function sector. Within the price range for which it is advertised, it performs well and is not overpriced. In my opinion, the functions provided by the manufacturer work/function without any problems with "NORMAL" use. One should assume a normal lifespan for the product and shouldn't expect a lifetime guarantee. However, for the momentum, it serves a sufficient purpose, and you can't complain.

As you'd expect from K&F, you get very good quality at a fair price. The current price of €220 shouldn't put you off, as you get very high quality and very good materials for your money.

For me as a videographer, a variable filter is a unique added value for the camera, because only with it can I achieve the look I need. This filter fits perfectly on the lens, as if it were made for it. The adjustment is smooth and reliable, and can be easily operated with one finger.

I don't see any situation where the filter distorts my image, regardless of the setting or angle; the image is always perfect. This is clearly due to the materials used and their finishing.

If you have the money to spare and want to do something good for yourself and your work, you can rest assured that you'll be using this filter.

The filter comes very well packaged in a box that can be converted into a picture frame. It is actually stored in a very high-quality leather case with an ejection strap, so you don't have to poke your fingers into the filter disc when removing it.

The filter and its mechanism are very exquisitely crafted; the filter thread can be easily screwed in without any scraping noises or frequent attempts to attach it. After tightening, it can be loosened again with moderate force, provided the internal thread of the lens is undamaged and of the same high quality.

The special feature of this (ND) filter, however, is the ability to continuously adjust the filter degree/strength using the screwed-on brass knobs, which works very smoothly and impressively! This makes changing the filter largely unnecessary; a simple turn of the rotating ring is sufficient. The range in which the filter effect can be changed is enormous. For example, from f/13 to f/5.6 at the same exposure time or at a constant aperture, the exposure time changes from approximately 1/4000s to 1/320s. This eliminates the need for several filters and allows for fine and easy adjustment to achieve the desired effect! Combined with the K&F quality of the Nano-x Pro series, the price is also put into perspective.

Personally, I'm absolutely thrilled; I've never had so much fun with a filter...

The K&F Concept filter arrives safely packaged. A dust cloth and a storage bag are included.

The filter's workmanship is truly first-class. High-quality materials, great handling, a perfect fit, and not too heavy on the lens or in the hand.

The filter is easily attached to the lens using a twist-and-turn mechanism.

The filter creates wonderful images that require no further editing.

The price may be a bit off-putting at first, but in my opinion, you're getting one of the best filters on the market. Professionals MUST buy it, and amateur photographers CAN buy it without hesitation.

I've used K&F ND filters in the past, so I wasn't surprised by the quality compared to newbies.

The filters allow for sharp focusing without any restrictions. Thanks to the extremely thin glass and the thin frame, there are no clouding or dark spots around the edges. The filter also has a threaded front mount, allowing you to easily mount several filters in a row.

Small holders are integrated into the frame to keep your fingers out of the frame when you need to make adjustments.

The 67mm ND filter set is rounded off with a nice leather pouch for storage. All in all, it's absolutely top-notch!

imazing service .

imzaing filter