100x100mm Square Black Diffusion Filter Kit Black Diffusion 1/4 Filter + Filter Holder

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.

Having some experience with ND filters, I always worry about purple corners or dark spots. I took the set out today and got no strange colors. I love this set, it mounts nicely to my lenses with no fear of it falling off. The picture was taken at 11mm, 13 seconds shutter on my Canon 50D, I found K&F Concept when I wanted a good tripod which I found from them. Now if i need any accessories for my photography i look to them first.

Great value. Filters fit snug and don’t let any light around them. Filters come in a quality case.

I recently purchased this set of filters for my Nikon camera but they also fit other brand cameras I own. That is a huge plus for me. For the money, this filter set perfectly meets my needs. This set is good quality, comes well packaged and arrived in perfect condition. I would recommend this set to others.

When you open the incoming package, you notice that the packaging is very high quality. The brand is very careful with the presentation of its products and the materials are of high quality. The filter holder and the adapter ring are made of metal and the filter holder has a sponge-like area, the function of which is to seal with the filter without allowing light to pass through. Once the filter holder is in place, it can be moved easily. The quality of crtsal 100x100 is very good, with highly polished edges. The filter holder has two slots for square filters, but the advantage is that the ring screwed onto the lens can be screwed to another round filter, for example a polarization filter. The picture is very good in my opinion. As with the brand's round filter, the sharpness isn't lost, I didn't notice the color cast, 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 filters. Those with filters were made with an exposure time of 20 seconds.

I bought this because the kit provides me with the variety of filter mounts I need to cover my lenses. I have not seen any problem with unevenness or color streaks in my images. Focusing is a challenge, of course, due to the filter density. The mounting rings attach securely to my lenses and the connection between the rings and the filter holder is solid. My filter fits firmly in the holder. I suggest inserting the filter into the holder "off camera." Screw the appropriate mounting ring onto your lens, and then "click" the filter/filter holder combination into place. While still holding the camera in one hand and the filter holder in the other, try to wiggle it or pull it off to test that it is firmly attached and that it won't fall off while you are shooting.

Was undecided whether to buy this or another brand. For the same quality filters would have cost at least twice as much. My only gripe would the filter holder could be a little bit sturdier.

Came in quality packaging. Adapter rings were in individual bags but don’t see that as a drawback.

Hoping the glass is a better choice than resins that scratch...will just need to be careful not to drop them.

Needed a 10 stop Nd filter for long exposure and decided after reading reviews to buy this bundle instead of buying a smaller cokin p size to go with and older format Hi-Tech system I have. So glad I did.

I LOVE how easy this is to attach to the lens. I need to take more shots...but so far I am not getting any color cast. I shoot raw anyway so it isn’t a deal breaker. I LOVE the glass. Because the set screw was a bit fussy on my Hi-Tech holder, I opted most times not to carry it with me. I would rather fuss with composition and camera settings than fuss with a filter holder. This one will be in my bag from now on for sure. It’s simple to set up in the field.

Update 10/12/19. Put this set thru it’s paces on a photo shoot in Hawaii. Professional photographer was impressed with the 10 stop glass. No color cast. Easy to use. Got the 6 stop and 10 stop glass. Highly recommend both. I just need to get a 3stop to complete my set.

Bought this to replace the cheap graduated filter set which provided terrible pictures. First thought as soon as you open the boxes is how well everything is presented and the build quality. All metal parts precisionally made. The graduated glass is of high quality. The pouch looks like leather and has an easy pull tab to gain access to the filter. The filter folder can rotate on the adapter. This is sprung loaded and is easy to attache and remove on the adapter. Anyone looking for good quality and value should consider this kit.