So I put together a little still life to show the difference between A) No Filter, B) another brand's 1/4 black diffusion, and C) this gold gold diffusion filter.

The first thing to note is that the difference between the nothing and the black diffusion is massive, of course, but the difference between the black and the gold diffusion is much more subtle. You'll notice that the 1/4 gold diffusion has a slightly stronger blooming effect that 1/4 black, but also the light scatters further and because of this there is less contrast overall. I wouldn't say its better or worse, this may or may not be what you want. I would also note that despite the gold particles the colour of diffused light is overwhelmingly the colour of the source light, not just some gold colour cast over the whole image. Put a blue light in the frame and it will diffuse a little bit of blue throughout.

Construction wise it is fairly premium, with a nice grip to it. It is aluminium, not brass.

Overall I'd say this is a 5 star example of a gold diffusion filter and if the subtle difference in look is what you are after then this might be for you. I would say though if you have no diffusion/mist filter at all though I'd certainly start with a basic black diffusion filter that maintains more contrast then check out the subtle difference between it and a gold diffusion filter and figure out if it's worth it.

As a photographer, I'm always on the lookout for filters that add character without compromising sharpness, and the K&F Concept Gold Diffusion Filter (67mm) has proven to be a very interesting addition to my creative kit.

I've primarily used it for ambient portraits and harsh sunset light, and the golden-toned diffusion effect really does soften the highlights beautifully, creating a warm, almost cinematic atmosphere without losing any shadow detail. Unlike a simple soft filter, this one maintains enough contrast to avoid a "smooth" look, instead giving it a smooth and elegant texture.

The build quality is solid: the ring doesn't introduce vignetting at standard focal lengths, and the coating is scratch- and fingerprint-resistant, which I appreciate when I'm frequently mounting and dismounting filters during outdoor shoots. I also noticed that the gold finish provides a warmer tonal transition that works very well for natural scenes or golden hour light.

If I had to point out one area for improvement, it's that the effect is moderate, so if you're looking for a very pronounced diffusion, it might fall short. However, for portrait, lifestyle, or landscape photography with soft light, it performs very professionally.

Lately, I've been experimenting with different filters to give my photos and videos a more distinctive look, and I have to say this filter has definitely changed the way I work, especially when I want to achieve that warm, dreamy evening atmosphere typically seen in films or more polished productions.
The first thing I noticed as soon as I mounted it on my lens was the build quality. The glass is really well-made, and you can immediately see that this isn't your typical cheap filter. The 28-layer coating isn't obvious to the naked eye, but reflections are minimal, which is crucial when working in challenging lighting conditions.
I tried it on an 85mm T2.1 FF, and the effect it produces is interesting. It's not simply a filter that warms the tones, it adds a subtle diffusion to the highlights, creating a dreamy effect, and—very welcome—without completely losing detail. I tried it for both portraits and some more narrative video shots, and in both cases the results exceeded expectations.
One thing I particularly appreciate is that the effect isn't overdone. Many diffusion filters tend to make everything too soft, resulting in an almost blurry image. Here, however, there's a perfect balance between overall sharpness and diffusion, making everything more pleasing without compromising the technical quality of the shot. The golden hue pairs beautifully with the natural light of the golden hour, amplifying that warm atmosphere without turning into overly artificial or orange tones that are difficult to correct in post-production.
The mounting system is standard with an 82mm thread, so it screws on easily and stays secure. It's not too thick, so you can easily use it in conjunction with other filters, although I personally prefer to use it alone so as not to compromise the final quality too much.
In conclusion, this Gold-Mist has become one of those filters that I always keep in my camera bag because I know that in certain situations it can really make a difference. It is certainly not a filter that you use every day, but when you want to give that extra touch to your photos or create a particular atmosphere in your videos, I know I can count on it. The balance between construction quality, effect obtained, and versatility of use makes it, in my opinion, an excellent tool for those who want to experiment with more creative effects without necessarily having to resort to post-production.

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..

Based on the product pictures I thought this filter will create a very extreme look. The reality is, this filter makes a very subtle golden diffusion in highlights WHICH IS AWESOME! It just turns everything "vintage". I think this will be baked onto my camera for most of my filming and photography, it just adds so much characterto it. Absolutely love it. It looks so cool when up close, it's like glitter trapped inside the glass filter. I attached some test photos taken with leica 12-60mm f2.8 on an olympus camera.

K&F CONCEPT 77mm Gold Diffusion 1/4 Filter Mist Soft Light & Warm Tone Effect Filter (X-Series)

Pros:
• Produces a pleasing soft diffusion that takes the digital edge off without killing sharpness.
• Adds a gentle warm tone that looks especially good for skin tones and natural light scenes.
• High-quality 28 multi-layer coatings help control flare and reflections.
• Works beautifully on my Canon EOS R paired with the 24–105mm, very consistent results across focal lengths.

Cons:
• Like most diffusion filters, it can slightly reduce contrast in high-backlight situations, something to plan for when shooting.

Best Use Tip:
This filter shines in portrait, lifestyle, and video work. Try it during golden hour or indoor window light for a cinematic, flattering look straight out of camera.

Final Thoughts:
A well-balanced diffusion filter that delivers exactly what it promises: softness, warmth, and character without going overboard. It’s earned a permanent spot in my camera bag. Appreciate you taking the time to read this.

Rating: ⭐⭐⭐⭐⭐ (5 Stars)
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Key to My Rating System:
5-Stars - This product stands out as superior or offers exceptional value. I highly recommend it.
4-Stars - Above average performance or excellent value. A solid choice for consideration.
3-Stars - This product meets expectations and falls within the average range.
2-Stars - Below average quality or poor quality control. Consider exploring alternative options.
1-Star - I strongly advise against choosing this product; look for alternatives if possible.

The photo below of Molly the dog shows the very subtle effect the K&F CONCEPT 72mm Gold Diffusion 1/4 Filter creates, with the warm Winter sunlight given a golden boost the filter, adding richer tones to the autumnal colours of both grass and earth around her, having been around cameras since the film only days, it is very reminiscent of the Fuji colour film I preferred. (no, don't ask me the name of it, this was 50 years ago!)

Hopefully the 2 shots of the Mine wheel serves to illustrate just how there is a slight shift toward gold when using the filter - the first is 'normal', 2nd using the filter. Sadly my normal provider of portraiture (grand daughter) is under 18, so I couldn't enlist her as talent for this review...

The K&F CONCEPT 72mm Gold Diffusion 1/4 Filter is spattered, quite evenly, with flecks of gold (I wonder if it is actually gold?), it doesn't noticably affect exposure, so less than 1/3 stop, nor does it add any unexpected colour cast to the image. Yes, the image has a soft & golden glow, that warms up all colours slightly, but not unnaturally.

I've not taken any video footage with it on the camera yet, but hope to add a few single frame grabs a little later.

The K&F CONCEPT 72mm Gold Diffusion 1/4 Filter arrives in a hard plastic case for protection and is provided with a microfiber cleaning cloth. The screw threads are cleanly cut and attached to both my lens and stepping rings smoothly,

Build quality is exactly as expected with a premium priced filter, both in the coatings on the glass and the 'feel' of the metal ring. (premium in relation to K&F CONCEPT's good value ranges)

I really like the 'vintage' film feel the filter creates, so no issue giving the 5 star rating.

This 72mm Gold-Mist filter brings an interesting artistic touch to my shots. The promise of the diffusion effect is fulfilled: the highlights are slightly softened and the skin looks smoother without losing too much detail. It is a useful tool to break the sometimes too pricked and digital side of modern sensors.

The Gold Shimmer Diffusion 1 Filter is a member of K&F Concept’s pro quality Nano-Xcel filter series. The lenses in the series boast a 0.2% ultra-low reflectivity 28 layer nanometer coating and aviation grade aluminum construction. The “1” in the designation means that this particular filter offers the strongest diffusion (i.e. 1/1) relative to other diffusion filters in the same series. Although K&F Concept includes "Shimmer" in the name, there is no shimmer effect; it is just there to aid key word searches.

Diffusion filters come in different strengths. The “1” in the designation means that this particular filter offers the strongest diffusion (i.e. 1/1) as compared to other diffusion filters in the same series.

Diffusion filters are also known as mist filters. They are predominantly used by filmmakers and photographers to achieve a soft, dreamy look. Old school portrait photographers will recall using nylon stockings to reduce contrast and hide skin imperfections. The advantage of using the gold diffusion filter over the nylon stocking trick is that now you are also adding a very subtle golden cast to the scene.

In my tests, the filter worked very well in softening skin texture. I also like the misty glow imparted to night scenes where there are strong specular highlights.

Knowing when and how to use the filter effectively does require experimentation. For example, bloom is not evident in my backlit scene test. Taking the same shot at a different time of day or at a different angle may produce different results.

In summary, I can recommend the K&F Concept’s Shimmer Diffusion 1 Filter as another useful tool for photographers who want to create rather than just take photographs.

I can describe this filter in a single word: quality.

As a professional photographer and filmmaker, I had some concerns the effect might be heavy-handed, but the results from my testing are far more nuanced and subtle, which is exactly what I would expect from a top-tier filter.

This Nano-X Gold Diffusion 1/4 is far more restrained and usable than many diffusion filters at this strength. The key point for me is that blacks are well protected. There’s no milky lift or crushed contrast, which is often the weak point of popular Pro-Mist-style filters on modern digital cameras.

The gold effect is selective rather than global. It becomes noticeable mainly on point light sources and strong highlights, where it adds a subtle, cinematic halation, but it doesn’t impose an overall warm veil across the image. In normal daylight and overcast conditions, the effect remains very natural.

I tested it on:

• skin tones (window light and mixed indoor lighting)
• backlit exteriors
• light-coloured buildings
• metallic subjects
• wide to telephoto focal lengths

In all cases, the diffusion remained controlled, with no unpleasant flare or unpredictable behaviour, even when deliberately shooting without a lens hood into direct sunlight with my 24-105 zoom. The effect is never cheap looking or contrived.

For anyone worried that a 1/4 strength will be too heavy-handed: this one isn’t. It takes the digital edge off without sacrificing important detail or contrast, and feels more cinematic than many stronger diffusion filters I’ve tried. On my Lumix S5IIX it makes the images and footage subtly more film like.

The build quality is also excellent, yet very slim, which helps reduce the risk of vignetting on wide-angle lenses. Despite the slim profile, the knurled edges provide sufficient grip when fitting or removing the filter. The glass has 28-layer multi-coating to deliver sharp image quality without compromising clarity, while offering tough resistance to water, oil, scratches and stains.

Highly recommended if you want diffusion that’s subtle, controlled and usable, with a gentle highlight roll-off and well-preserved shadows, rather than a heavy stylised fog effect. This filter really exceeded my expectations and I plan to use it a lot.
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