Very good quality K & F Concept ND1000 square filter set consisting of glass filter holders and lens adapters for the filter holder. The package is divided into 3 parts: 1. A bag with metal rings adapters for different lens diameters. 2. A case containing the filter and its leather carrying case. 3. A box with the filter holder. The adapter rings allow us to place the filter holder on any lens as we have a large number of different diameters. They are made of black metal and are well made. With inscription on each ring of the corresponding diameter. The filter is made in Germany glass. It is a 100x100mm square and 2mm thick ND1000 filter. It allows us to remove 10 levels of light to make daylight long exposure photos perfect. In the example photo I've hung, midday is taken at around 30 inches. I love the game that you can get to this filter. The filter comes in a leather case and tissue paper. The case is heavy enough to protect it properly. The glass does not mark easily with fingers and does not attract dust. The filter holder is metallic with the part where the filters come from some kind of very hard plastic. They fit easily on two filters 100x100 and also on the slopes 100x150mm. The attachment system on the adapter ring is thanks to a very handy metal tab. In several tests I ran under different lighting conditions, I didn't notice the ingress of residual light because of the space between the filter and the portafilter. The photographs have a slight magenta tint that is very easy to edit, but they are not overdone at all. With the complete kit and price, it's a fantastic filter to experiment with and get excellent results. I'm really excited and really enjoying it. I highly recommend it!

I got this for several of the 52mm lenses I have. It threads on smoothly with no wobble and is made of nice, thick plastic.

One of these lenses is a 18-55mm zoom used on a Nikon DSLR with an APS-C format sensor. The manufacturer’s description says not to use this hood on any lens with a wider field of view than 25mm to avoid vignetting (darkening of the edges of the photo). The crop factor for Nikon APS-C sensors is 1.5x, so at 18mm this lens has a field of view comparable to 27mm on a full frame digital camera or a standard 35mm film camera which is usually used as the reference when describing the field of view of lenses attached to cameras which evolved from 35mm film cameras. Look it up to get a better idea of what I’m talking about if you don’t already know. I’m not that keen on it myself.

Anyway, 27mm is uncomfortably close to 25mm so I ran some test shots of an evenly lit yellowish blank wall with the Nikon to check for any vignetting. The camera viewfinder is not 100% accurate so I had to go with the actual pictures. I found no noticeable vignetting at 18mm as long as the hood was oriented with the two largest “petals” pretty close to 12 and 6 o’clock. I found that to achieve the no-vignette at this position, the hood needed to be screwed in all the way – meaning that the lock ring had to be all the way snugged up to the body of the hood. A partial rotation of the ring to secure the hood with the petals at the correct position was okay, but even a few full “backwards” rotations of the lock ring which prevented the hood being screwed down as far as possible started giving me some vignetting.

Even locked down to the right position to start off there’s a slight rotation of the front of the lens to achieve proper focusing (unless you have one of those expensive lenses that have internal focusing), but the movement is fairly minor and didn’t give me any trouble. You probably will have trouble, though, if you screw the hood onto a filter and then try to shoot at 18mm! If using a zoom lens you could cancel any vignette by just selecting a slightly longer focal length at which to shoot.

Apologies for going on, but the take-away is that you shouldn’t have vignette issues using this hood at 18mm on a APS-C format camera. Canon has a 1.6x crop factor which puts you even farther from the 25mm danger zone. If you have a full frame format digital or a 35mm film camera, you would have major issues at 18mm. So, then don’t use any focal length under the 25mm mentioned. Of course, if you are using a zoom lens, you can use it fine at focal lengths greater than 25mm.

I don’t need to penalize this hood by taking away stars as it seems to be well made and does its job very inexpensively.

Very high quality ND1000 K&F Concept square filter set consisting of glass filter, filter holder and lens adapters for the filter holder.

The package is divided into 3 parts:
1. a bag with metal adapter rings for lenses with different diameters.
2. a box with the filter and its leather carrying case.
3. a box with the filter holder.

The adapter rings allow us to put the filter holder on any lens, since we have a large number of different diameters. They are made of black metal and well made. With inscription on each ring of the corresponding diameter.

It is a square filter ND1000 100x100 mm and 2 mm thick. It allows us to remove 10 light levels to make long exposures in daylight perfect. In the example photo I posted, it is taken at noon at 30 ". I love the play that can be taken from this filter.

The filter comes in a leather case and is covered with tissue paper. The case is sturdy enough to protect it properly.
The glass is not easily marked by fingers and does not attract dust.

The filter holder is metallic, with the part where the filters rest being made of some kind of very hard plastic. They easily fit two 100x100 filters

K&F Concept Square Metal 100mm Filter Holder with 8 Lens Filter Adapter Rings 49mm to 82mm. Great addition to my filter collection. I bought the wrong size filters so I had to buy this kit. Well built product with most of the adapters I needed. K&F seems to be making some really good stuff at a great price that will help us amateur snappers without breaking the bank.

For beginners, the price is unbelievable and you also get a lens hood that costs more from Canon's original than this whole set would take in its place immediately

I'm really happy that this filter can be screwed onto my Nikkor Z 24-70 f/4 S with the lens hood in place. Obviously I need to reach into the lens hood to adjust the filter, but that's ok. No vignetting that I can see.
The filter works great, nice smooth action and a great range of density.

Works very well, I only recommend buying an additional lens hood because if there is backlight in the picture, it looks purple in the picture. Nevertheless, I am very satisfied, it does what it is supposed to do, I can't complain

I'm really happy that this filter can be screwed onto my Nikkor Z 24-70 f/4 S with the lens hood in place. Obviously I need to reach into the lens hood to adjust the filter, but that's ok. No vignetting that I can see.The filter works great, nice smooth action and a great range of density.