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 $73, it’s much more budget-friendly than purchasing a single ND1000 filter. This is a great set-up for beginners and professionals alike.

The set makes a very valuable impression overall.
The adapter rings are made of black anodized aluminum - they are well made, not sharp-edged and the thread can be easily screwed onto lenses.
Apart from the filter inserts, which are made of plastic, the filter holder is also made of black anodized aluminum. Here, too, the processing is excellent. Maybe the quality of the plastic inserts could be a tick better, but that's already whining at the highest level. The inserts fit all 100mm x 100mm filters with a thickness of 1mm - 2mm.
packaging was impeccable; Adapters are individually wrapped; Filter holder is in a nice padded cardboard box.
Full points and recommendation for a perfect rectangular filter system at a significantly lower price than some other manufacturers.

This setup is perfect for my lenses on my pentax k50. The quality is definitely there and surpasses most other on the market. The glass is very nice and the packaging is great.

When you open the incoming package, you will find that the packaging is very high quality. The brand is very careful in presenting their products and the materials are of high quality. The filter holder and adapter ring are metal and the filter holder has a spongy area whose function is to seal with the filter without letting light through. Once the filter holder is attached, it is easy to move. crtsal 100x100 quality is very good, with highly polished edges. The filter holder has two slots for square filters, but the advantage is that the ring screwed on the lens can be screwed with another round filter, for example a polarizing filter. I think the picture is very good. As with the brand's round filter, the sharpness is not lost, the color cast did not catch my eye, anything that can be edited during development is appreciated. The ND1000 filter included in the kit enables long exposures in strong light. The sample photos are photos taken on a cloudy afternoon with and without a filter. Those with filters were made with an exposure time of 20 seconds.

a hobby photographer accessories can be expensive and their quality can be hit or miss. This product delivers and the photos are amazing. I would definitely recommend this filter if you want professional quality results for a good price.

The best ND filter out there.

Ya he hecho algunas fotos realmente bonitas con este kit (soporte + 8, 64, 1000), productos de primera a precios realmente buenos

Buena relación calidad/precio, cuesta tres veces menos que otros.

El filtro produce un acabado suavizado de los objetos y personas y al ser cuadrado se puede usar con todos los objetivos acorde con el tamaño de este; buena calidad y un estuche de lujo para guardarlo

I've been toying with the idea of ​​buying a gradient filter for a long time, although prices around 150 euros have always put me off.

In the end I went for a K&F retail filter, which was a lot cheaper, and I really wasn't disappointed!

+Nice transition
+High-quality glass
= High-quality processing

The filter does what it is supposed to do, it easily darkens an overexposed sky and saves me a lot of work in post-processing in Lightroom.

Highly Recommended!