Good lens filter to add some personal style to your photos. I own a few K&F Concept products, believe me when I say their stuff is quality. This filter is no different. This packaged has high quality case, glass, etc. Comes with 3 cleaning cloths whenever they get dirty. I got a 58mm lens for my XF16-50mm and it was easy to install and fit perfectly with absolutely no issues. Again, glass is quality, there is no artifacts seen in the photos other than turning lights into pretty stars. The shell is made out of a good strong material and there is some weight but overall it is light. Rotating the filter frame, it provides you with the ability to change the lens flare angle around. Gives you tons of creative freedom if not already and again adds some personal style to your photos. Overall, another high quality product from K&F Concept, I recommend this and I will continue to purchase K&F in the future.

This K&F variable star filter is a simple way to give a different look to photos and videos without loading multiple filters. The ring rotates 360° with good resistance, doesn't feel loose, and the metal frame feels firm. The product image clearly shows how the pattern of the lights changes when rotated, and that matches the actual use: you can adjust the tips of the stars to your liking, symmetrical or slightly out of date depending on the frame.

The effect works best with spot lights, especially at night. Outdoors is where you shine the most, with clean and well-defined stars. Indoors it's more irregular and some lamps barely react, so it's time to try. I didn't notice any vignetting or rare image degradation on the lenses I used. The only thing that can be improved is the protection: the box is basic, it is not identified and does not include a front cover, so the glass is slightly exposed. Even so, to get out of the visual routine and experiment, it does its job well.

I'm not 100% sure how I feel about this filter. It's very subtle in its effect most of the time which makes it easy to toss on and forget but be pleasantly surprised by every so often. It also occasionally shows the filter pattern on the bokeh in the background which can take a decent background and make it suddenly distracting. Examples are in the photos attached to this review.
In the Christmas tree photo with the red LED in focus, you can clearly see the triangle pattern from the filter in the white bokeh balls on top of the tree on the right hand side of the photo and a little bit in the yellow bokeh ball midway up the tree on the left hand side of the photo. While I think the star effect on the red LED looks really nice and the rest of the tree is sufficiently sharp, those triangles in the bokeh balls are incredibly distracting in my opinion.
The same effect is also seen in the tree photo with the yellow LED in focus and the triangle pattern in the green bokeh balls.
The snowman snowglobe photo shows some of the star effect on the glitter near the cardinal on the broomstick and I didn't see anywhere in the photo where the triangle pattern appeared. Given the relatively smaller size of the bokeh, I think there's just not any single color spot big enough in that photo to show the triangle pattern.
All photos taken with a Sony a6000 and a Sigma 30mm f1.4 lens.

The filter itself is very nice and a good quality. It screwed on my camera lens easily and was even easy to attach my lens cap to. It's lightweight and offers some protection for the front elements. I think it's nice to have especially around Christmas time but I wouldn't want to use it all the time. It's fun for pictures with lots of points of light that might be in focus but it can definitely show up in bokeh balls in unexpected and rather unpleasant ways. So a fun filter but not for everyone.

The filter puts the light in the right light:)

The quality of the thread is good and feels high-quality.

I am always impressed when simple products simply do what they claim to do and that is the case here.
Star formation works perfectly. (see picture)

There is nothing wrong with this. If you want to let off steam a bit creatively with your pictures, you are welcome to take a look here.
3 microfiber cloths for cleaning are also included.

Definitely a purchase recommendation!

The K&F Concept 67mm Short Line 6-Point Star Filter is an absolute blast to have in your kit! For the price, K&F continues to knock it out of the park with budget-friendly filters that deliver big on creativity and fun.

I love breaking this one out for night-time cityscapes, street lights, and even concert stages—any situation where you want to add that extra pop and sparkle to your shots. It instantly gives your images a unique flair, making those “just for fun” moments even more exciting once you’ve captured the must-have photos.

Build quality is surprisingly solid, and the threads are smooth as can be. I’ve had budget filters in the past that were a nightmare to remove, so I always brace myself—but K&F nailed it here. No sticking, no binding, just easy on and off.

All in all, this is a super fun filter worth keeping in the bag. It’s perfect for those one-off creative moments when you want to play around and add a little magic to your photos.

I like taking photos of my friends and family when we go check out christmas lights and these are perfect for getting a sunburst in my portraits. I have multiple k&f concept filters and as always, packaging is great and the filter works well. Maybe I'll upload a photo I took with it sometime.

It's worth the cost, it's cheaper than most brands and considering how widespread their product line is it's a no brainer for affordable, quality filters.

I couldn’t be more happy with the end result of this filter. If you ever want those sparkles and twinkles of the lights to stand out, use this filter. It works on most catches of light. It’s more prominent when using this in dimmer settings but it can be seen clearly even in light. This will be so cool if you’re taking pictures of Christmas tree lights or the lighted star on top of the tree. I’ve played around with this lens before photographing the street lights. I think it helps to tell a story when you catch the starlights in your pictures or even in someone’s eyes. This comes with two microfiber cleaning cloths and a solid storage case for protection. The inside of the case has two finger holes to keep you from touching the glass off the filter while storing or taking it off the case. The case can even be used long term due to the good quality of it.

This filter delivers on producing a nice repeatable star pattern in my photos! I like how the star effect is limited, I have a different filter that produces large overlapping stars. The metal ring on the filter has even threads that attach easily to my camera lens. Rotating the filter changes the angle of the star effect so you can adjust it to your preference.

A quality special effect filter to add flare to my holiday photos!

Little of the photography I do calls for an effects filter of this type. But I'll keep one on hand that offers high quality and performance. As the most recent of a number of K&F filters I own, this 18-layer, multi-coated, four-point, short-ray star filter does exactly that. The filter threads securely on the front of the camera lens, allowing the effects ring to smoothly rotate and produce light rays at different angles and apparent lengths. At the end of a session or at any stopping point, a lens cap fits easily on the filter front and can remain there protecting your glass while packing gear or until resuming the shoot. The star effect is most pronounced when shooting bright, pinpoint lights and reflections. Focusing can get tricky, though, any time you are shooting toward a light source. Generally, I’ve found autofocus to be effective, nonetheless. Manual mode, however, may work best in some situations. Aperture is also a factor. Experiment with higher, f/16 or f/20 settings and try varying the ratio between the light source and existing light. The effects of a short-ray, four-point filter are more on the subtle side. As with any effects filter, trying to compensate for that by over-using it can quickly produce a gimmicky look. Enhance the scene, don’t recreate it. Included with the filter are a greeting and three microfiber cleaning cloths. There is also a plastic filter case whose difficulty to open is made manageable only by anticipation of the quality filter inside.

**update** added a couple pics showing effect on sequins - I may have had a 1/8th black diffusion filter on some as well I'm not certain.
This is a very enjoyable filter whose star tails are far less destructive / invasive than the standard starburst filters. Excellent for direct lines of sight for small scattered LED's, they also add tails to flares from shimmer walls and such, though less organized and pronounced. Comes with multiple microfiber cloths for keeping your whole kit clean this is a good deal for a very functional and effective filter. I don't want to share any of my current images but will try to shoot some just for this review shortly. If you have say a LED strip light with many diodes, like a grow light as an example, the effect is overpowering. For a string of spread out fairy lights it's much more whimsical.

When I photographed my home this spring with a regular starpoint my landscaping lights just turned into a full frame flare-spectacle in a way that was quite distracting, I'm looking forward to redoing that image now with this and it should have a much more quaint feel.

I got the 77mm for use on my 5dmii and have been shooting with my 24-105mm F4.
I will continue to experiment and update this review with more nuance and images soon.