SN25T1 ND1000 Square Filter 100x100mm + Metal Holder + 8pcs Adapter Rings For DSLR

Awesome filter kit,
Product packaging is Decadent,
The item itself is of high quality,
Aluminium filter holder and lens rings,
And the filter case is top notch,
The filter itself is High quality optical glass,
Tested this out as soon as it arrived,
Does not suffer from light leakages and there is no colour cast on the images unlike some other brands, overall I am very satisfied with my purchase, will hopefully be looking to get the k&f graduated filters next,
A recommended buy.

This is straight out of the camera and hasn't been retouched. Quality is good, the stones are sharp the water is soft, all in all not a bad product.

Updated 21.05.25
I informed them of this issues and even though this was purchases 18 months ago. They have since sent me a complete new holder with the missing part attached.

Excellent service. Still worth checking this when it arrives should any other have slipped through the net in production.

Gap between the glass filter and filter holder. Not ideal when the point of an ND filter is to reduce the light into the lens. Needs some work.

I bought this ND filter kit as I have had a great experience with K&F (their tripod is brilliant) and was looking for a system that would work with all my lenses. Firstly, the quality of the packaging and storage is extremely high, the glass comes in its own case that keeps it clean and safe. Secondly, it's very easy to set up and use (a little fiddly if you hand are cold) and thirdly, the picture quality is great, there is no colour casting (the colours you see in the images above is my editing, not the fault of the ND filter) and it allowed me to blur the water and clouds in the middle of the day.

Great product. Could improve by making frame and some adaptor rings fit in pouch.

Very nicely packaged, does the job, but a little tricky to affix, until you get the hang of it. Not a straightforward fit
Shame, otherwise would be 5 *

Great deal working perfect and nice quality
Easy to use

I found the set very useful for giving a class on long exposures. The multiple rings allowed me to put the filter onto the range of lenses the students brought. The packaging and quality of the filter and holder is excellent. The attached photograph shows the River Thames blurred at Richmond Lock - some slight cloud motion there too.

A few years ago, I started beefing up my camera equipment. I had a Canon 5D Mark IV camera body, but didn’t have great glass. So, I started my gear journey by upgrading my lenses. I now have four amazing lenses including a 70-200, 24-70, 100mm Macro, and a Wide Angle lens. After I finalized my collection of lenses, I started looking at accessories I needed to accompany those lenses and came up with a short list of items that included high-quality filters. The problem I had was that I needed to be able have filters that works with all my lenses. Buying filters for each one of your lenses can get really cost prohibitive. So, one solution I found was to get a square filter with step-down rings. K&F Concept has a great option for this type of set-up so I gave it a try.

About a month ago, I shot photos at a wedding on a mountaintop in Tennessee. It was in the middle of the afternoon and the sun was super bright at the location of the ceremony. The venue was huge and I wanted to pack my camera bag somewhat light so that I didn’t have to struggle with tons of equipment. The square filter set from K&F concept was perfect for this type of work. The kit is lightweight and it makes it possible to use the one filter for several different sizes of lenses. During this wedding I was working with an 82mm lens and a 77mm lens as my primary glass. At the ceremony site, I had to quickly swap lenses and reapply the filter in order to get the shots the couple wanted. I found gaps in the ceremony where I could quietly and quickly change lenses and attach the filters without disturbing the event. It worked perfectly and even though some people might consider it cumbersome, I thought it was a lot easier than having to swap lenses and then screw filter into each lens.

When using these filters, I shot exclusively in RAW, but did not perceive any color cast from the filters. The mount is solid and the filter is well-protected by the soft lining in the case. It’s very easy to attach the mount to the lenses and in my opinion is actually easier to work with than individual filters.

I do feel like the lens adapter could fit a little more snuggly onto the camera lens, but I’m definitely not complaining about that and it is certainly not a dealbreaker. It’s just a tweak that could make the product even better than it already is.

One of the most appealing features of this product is its price. At £100, it’s much more budget-friendly than purchasing a single ND1000 filter. This is a great set-up for beginners and professionals alike.

Delivery was very fast. Unbeatable for the price... Everything is processed to a high standard. I can't confirm some criticism that the graduated filter is less foggy towards the middle. It was done very cleanly in my case. If the insertion should be a little difficult, then loosen the 4 screws on the filter holder a little bit and everything runs like butter! No colour cast on the filters! Great bags included... Polarising filter story, just screw an existing one onto the lens and then the filter holder on top. What more could you want without having to spend 400-500€? Full marks from me.