I was intrigued by this filter, especially since I like to shoot with legacy lenses. The weather isn’t cooperating to try the filter outdoors, so I did what I could inside. Because cameras and lenses render images differently, I tried the filter with three different cameras and six different lenses:
Panasonic GF1 with Zeiss 28mm f/2.8
Panasonic GF1 with Zeiss 80-200mm f/4
Canon R5 with RF 100-500mm f/4.5-7.1
Canon R6 with EF 70-200mm f/2.8
Canon R6 with EF 50mm f/1.8
Canon R6 with Zeiss 50mm f/1.4
Canon R6 with Zeiss 28mm f/2.8

Having such a slow aperture, I didn’t expect much from the 100-500mm, and it lived up to my expectations. It was also difficult to see the effect with the Zeiss 80-200mm. It was there, if you knew to look for it, but it didn’t stand out. The Zeiss 28mm is a very sharp lens, and the filter did a nice job of taking the edge off, giving the flowers a softer, more romantic look. Likewise, the 70-200mm at f/2.8 also showed the effect nicely. Where the filter seemed to really shine, though, was with the two 50mm lenses. Shooting the lenses wide open, I could see the effect readily when flipping back and forth between the photos. Another thing I noticed, is that changing the camera’s angle in relation to the lighting makes the filter’s effect on lowering contrast more visible.

It’s clear to me that there’s more to this filter than just putting it on the lens and shooting. It’s going to take time to learn how to make the most of all it has to offer. Just in the short time I’ve spent with it so far, though, I really like it. I love the vintage look, especially when used with my old Zeiss lenses. It even gives me a new appreciation for the Canon EF 50mm, a cheap lens I almost never use. That may change, although with a 49mm filter size, I had to use a ridiculous number of step-up rings to put the 77mm filter on it. One thing to note, this filter has an aluminum frame. I wish it were brass, but it is what it is. I got it stuck once and managed to free it. Be careful not to tighten it more than necessary when putting it on your lens.

In the end, is the filter worth it? It depends on what you’re after, but for my uses, I think it is. I love to shoot old buildings, historic places, old trains, and similar scenes, then convert them to black and white. At 12 megapixels, my old Panasonic with the Zeiss lenses is fantastic for this. I haven’t been able to duplicate the way it renders with newer, higher resolution cameras. This filter may help, though, by softening the hard edge, technical look just enough to achieve the vintage look I’m after. I’m anxious to get out and try it.

I have some mixed feelings about this gold diffusion filter, even though there are a lot of things I genuinely like about it. The first thing that stands out is the build quality, which is excellent. The glass itself is very high quality, with excellent light transmission, and the gold speckling does not interfere with image sharpness or clarity in any noticeable way. It simply adds a warmer tone to the image, which is exactly what it is designed to do. From a materials and construction standpoint, this feels like a premium filter made with very good optical glass and solid multi layer coatings.

In use, the filter does exactly what it claims. It produces a soft golden glow in the highlights and gives images a warmer, more nostalgic look, almost like a late afternoon or golden hour feel baked directly into the shot. I do like that this is a one quarter diffusion, since it is not overly aggressive. It changes the character of the image without completely overpowering it, and the diffusion effect remains subtle while still being noticeable. Contrast is slightly reduced, highlights are softened, and skin tones do benefit from a more forgiving look without losing overall sharpness.

The 77mm thread fits my lenses perfectly, and there were no issues mounting it. I also use step up rings on a couple of other lenses, which works fine, but of course that means I cannot use a lens hood in those cases, so that is something to keep in mind depending on how you normally shoot.

Where my hesitation comes in is the price. Paying close to one hundred dollars for a diffusion filter feels excessive to me, even acknowledging the excellent glass quality and coatings. If you are someone like me who shoots RAW and is very comfortable editing, I am not convinced this filter provides a look that cannot be achieved in post processing. With modern editing software, LUTs, and a few well placed adjustments, I can get extremely close to this same warm, cinematic look without committing it permanently in camera. I did not see anything in the images that truly stood apart from what I could recreate later with sliders and color grading.

That said, if you are someone who prefers to get the look in camera and does not enjoy heavy post processing, this filter absolutely delivers what it promises. The glass is excellent, there is no noticeable degradation in image quality, and I did not experience unwanted reflections, flaring, or color artifacts. The diffusion effect is tasteful and subtle, and the golden tone is pleasing rather than overpowering.

In the end, this is an excellent quality filter that performs exactly as advertised. It creates a soft, golden diffusion effect with very high optical quality. The biggest downside for me is simply the price. If cost is less of a concern and you want this look baked into your images, it is a very good option. If you are comfortable editing and chasing value, the cost may be hard to justify despite the undeniable quality.

This is a review for K&F CONCEPT 67mm Gold Diffusion 1/4 Filter Mist Soft Light & Warm Tone Effect Filter with 28 Multi-Layer Coatings for Video, Vlog, Photography(X-Series), ASIN B0G5PN5LQP

The filter arrived in a plastic wrapped cardboard box with the filter inside that round plastic case that K&F often uses. It arrived in perfect condition.

I tested this in my house with my Olympus EM5 mark ii and Olympus 12-40mm PRO II lens. I included four photos, the first and third without the filter, second and fourth with it.

The difference is very evident, even just in the jpegs straight out of the camera. The light is clearly more diffuse in the ones with the filter, and colors are overall softer, softer edges. Almost like the vaseline-on-the-lens effect. The photos are lovely, even being inside my house with the only light being sunlight on my cat.

I wanted one of these lenses for so long and was pleased to finally nab one. I went with the 67mm size and used a filter size adjuster from K&F to get it down to 62mm. It fit perfectly and looks so good! I really think this and the CPL are the only two filters I will bother with.

I think this one is def worth grabbing for those beautiful sunlit moments. I haven't tried it yet at sunset (it's winter here, plus I live in a valley, so there isn't much golden hour light), but I look forward to getting to!

I've always enjoyed K&F Concept products for their nice balance point between quality and price and this filter is very much in line with my expectations from them.

While using filters like this has fallen out of favor because everyone will "just fix it in post" I still enjoy adding something like this to a lens and going out to be creative. I did my testing on a Nikon 85mm f/1.2, mounted on a Nikon Z9 over the course of a few days and I was very happy with the results.

First, the filter will add a softer feel to all your images, no matter the subject. There are many examples of this and I've included a landscape one in my review. This softness is sometimes a nice creative touch when you're using a clinically sharp lens especially in portrait photography. The other effect is a warming effect that is natural and not too overt. Also great for portraits and landscape in my opinion.

Construction is excellent, as expected from K&F, with a good tolerance ring that screws into the end of the lens without binding or sticking. The filter itself is light weight and easy to handle.

The price at the time of writing this review was reasonable and I felt like it delivered a good value for the price.

If you're wanting a little bit of creative class for you images and want to get away from the clinically sharp looks while not spending a lot on a filter, this should be an option to consider. Keeping it in my kit for my 82mm primes. Good job K&F!

This is a very unique creative filter that I have been using for street and portrait photography. I chose the 77mm size and it fits perfectly on my Canon EF 70-200mm f/2.8 L lens. Installation is smooth and the threading feels precise without any resistance.

The build quality stands out right away. The filter frame feels solid, and both the metal construction and the glass element give it a premium feel. Even the round storage case feels well made and protective, which is always appreciated when carrying filters in a camera bag.

In terms of image results, the gold diffusion effect adds a subtle warm character and soft glow that works nicely for daylight portraits and creative street shots. It gives images a distinct look without completely overpowering the scene. Considering the materials and overall performance, the price feels very reasonable for the quality you get.

The truth is that I use mist filters a lot, especially on video. I like them because they help a lot to create atmosphere and give it that more cinematic touch that, let's be honest, photo optics alone don't usually have. The movie image is not as clinical or as “sharp”; although there is sharpness, it is a smoother, more pleasant sharpness. And that's where a mist filter fits very well to break up that typical hardness of photographic lenses a little.
Once tried, I have to say that I was quite surprised for the better. Of course, there is something very important to keep in mind: you have to work on the color temperature manually. If you don't, the camera will tend to compensate for that yellowish tone of the filter and the effect is greatly diluted. Outdoors, for example, you have to set the camera at 5500 K; if you leave it on automatic, the camera neutralizes the gold and it almost looks like you're wearing a normal mist.
When you adjust it well, the camera generates a very beautiful golden tone, nothing exaggerated, with an almost magical point. It is not an ugly or outdated yellow, it is very pleasant and gives a very clear personality to the image. In addition, the effect is not noticeable in all situations: with totally favorable light it is barely noticeable, but with backlights it is where the filter brings out the best in itself. That's when the magic really comes in.

Aside from the golden hue, the halo and the typical mist bloom are very well crafted. Highlights soften, blur gains character, and the overall image looks prettier, more organic. It's not a gross effect, it's quite fine, especially considering that it's a clearly effectual filter.

In terms of quality, the filter is very well built. The glass looks good, the ring is solid and it comes with a round hard cover that protects the filter quite well, something that is always appreciated when you carry several things in your backpack.
or photos it looks great, but where it really shines is on video, there it's spectacular. It gives a lot of creative play and can completely transform a scene without having to play too much in post-production.

Of course, it's not a filter to buy in several sizes, because it's a lot of money. Your thing is to buy it in the largest size you have and use adapter rings for the rest of the lenses. It's the most logical option.

What I said: a very interesting filter, with a beautiful effect, especially for video, well built and with its own personality, but clearly expensive for what it is. If the price doesn't hurt, it's a very good creative tool; if not, you have to think about it a lot.

The K&F CONCEPT Nano-Xcel 82mm Gold-Mist Filter is a crazy filter that transforms black mist into gold mist!
The effect is obvious but controlled: the point lights are transformed into a soft golden halo, very pleasant at night, in backlights or with artificial lighting. The result is a warm, almost “vintage” rendering, reminiscent of certain cinematographic films. It reduces contrast slightly and softens highlights, without blending the image.
It works well on the portrait: the skin appears more uniform, the imperfections are attenuated, but the subject remains defined, it is not a heavy or fake effect, rather an elegant glow that adds atmosphere.
The build quality is solid, Japanese AGC optical glass with good light transmission, no obvious chromatic dominance, with 28 layers of nano coating that help against reflections, water and micro-scratches. The thread is precise and does not cause assembly problems.

Conclusion: a very interesting filter, to try if you want a refined but always natural, warm and suggestive effect. The build quality is always TOP!
Pass the tests with 5 stars!

This K&F Concept 82mm Gold Diffusion lens filter is fabulous quality, just as all glass I have ever had from K&F Concept is.

I am a hobbyist photographer and only occasionally dabble in a little video and prior to being given the opportunity to try this filter, have only experimented with electronic film LUTs in post.

Having given this a try, the results are certainly excellent and quite probably better than using post processing filters as I have in the past, however I do feel that to my untrained eye, any discernible difference unfortunately does not warrant the cost of the filter, particularly as if I want to use different lenses, I need a different step up ring for each one (I decided to go that route rather than buying multiple filters to fit each lens).

The other issue is of course that if you film with the filter on, the effect is baked into the footage, so if you want to repurpose your footage or decide you don't want the gold diffused effect, then you're stuck.

However, if you know for certain that that's the look you're after, want the look done very, very well and aren't planning to swap lenses all the time, then for sure, you will not be disappointed with these K&F Concept filters. In my opinion, they are as good as you get.

Classic diffusion filter in digital times — conscious decision

Of course, the question is why, in the age of powerful digital filters and extensive post-processing tools, you should still use a classic lens filter at all. The K&F CONCEPT Gold Diffusion 1/4 is clearly aimed at users who want to define their look as soon as they shoot — and not just later on the computer.

Character instead of neutrality

The Gold Diffusion 1/4 is not a neutral “always on” filter. It requires conscious, creative use and a good understanding of when the effect makes sense. Used correctly, it creates a pleasant, slightly soft look that softens contrasts, gently diffuses highlights and gives the picture a subtle, cinematic appearance without visibly losing sharpness.

The filter can show its strengths, especially when it comes to portraits, available light scenes or cinematic subjects.

Benefits directly in shooting

A significant added value is that the desired look is created directly in the camera. This significantly reduces the need for complex post-processing and ensures consistent results across an entire sequence. This is a real advantage, especially for video recordings, as the diffusion effect is uniform and natural.

Processing and coating

The optical glass combined with the multi-nano coating (Nano-Xcel) makes a high-quality impression. Reflections and loss of contrast are well controlled, color shifts remain subtle and deliberately in the “gold” character of the filter. Mechanically, the 77 mm filter fits the lens cleanly and without playing.

Conclusion:

4.5 out of 5 stars: The K&F CONCEPT Gold Diffusion 1/4 is a tool for targeted image design, not for permanent use. Anyone who knows when and how to use Diffusion creatively will get very convincing results straight from the camera — with less post-processing effort and a clearly defined look.
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This 67mm Gold Diffusio filter adds character without overwhelming the image. It’s subtle enough to leave detail intact, but noticeable enough to change the mood of a shot.

The “gold” aspect isn’t heavy or artificial. It adds a gentle warmth to highlights, especially around practical lights, windows, or backlit subjects. Point light sources bloom slightly, creating a soft halo effect that feels more cinematic than clinical. It leans toward a late-afternoon warmth rather than an obvious color shift.

Skin tones benefit the most. The filter softens harsh digital sharpness and reduces the appearance of minor skin texture without turning faces into plastic. Pores and fine lines are toned down, but the subject still looks natural and sharp. It helps take the edge off modern sensors that can sometimes feel too crisp.

Contrast is lowered slightly, which contributes to the film-like feel. Blacks remain usable and detail isn’t lost, but the image becomes more forgiving and atmospheric. For video work, especially interviews or lifestyle content, it adds depth without looking artificial and/or filtered.

Build quality feels solid. The glass is clean, the coating resists fingerprints reasonably well, and reflections are controlled. It threads smoothly onto lenses without binding. The multi-layer coatings help maintain clarity, and there’s no noticeable color cast beyond the intended warmth.

This is not a heavy diffusion filter. It won’t dramatically change a scene or create extreme glow. It’s more about refining harsh light and adding mood. Used intentionally, it enhances storytelling rather than distracting from it.

For video, vlogging, portraits, or any scenario where digital sharpness needs softening and warmth, it delivers a consistent, controlled effect. It adds atmosphere without sacrificing image integrity and it's a great value for the money..