I had been looking for a rectangular filter holder for a while and after some research I found what I was looking for with this vendor.The holder comes with 7 adapter rings so it can be attached to a variety of lens diameters.The adapter ring is rotated onto the lens thread and the holder is simply mounted onto the ring.The holder holds securely and doesn't give me any concern that it won't hold, even if it has minimal play.

Very easy to use system. The picture quality is really good as far as I can tell. The polarizing filter works very well. Thanks to the adapters, the filter can be used on any lens. I've never regretted buying it.

Delivery time was faster than I expected, received them after a week from New Zealand. I love the packing style which brings to customers a professional attitude. Thank you for that and I will buy more products later on. :D

I loved the quality of the materials, all metallic. I looked at many kits but they were all plastic and this one caught my attention especially from the comments. The truth is that it was a success because any other similar kit does not fall under 300€.The optical filter nd1000 is made of glass and gives a very good quality. The only thing I noticed is that it loses a little saturation and the white balance is a little bluish, but when processing the RAW it is easily fixed. You increase the color temperature and saturation and you are done!!! (I use a Canon 80d + 16-35 f4 is). I imagine each lens will be different.Attached a few photos so you can see the difference with filter and without filter. Exposure time on the photo with the 30" filter.If you want to start in the world of filters, do not even think about it for this price. Excellent results.

Very good value for money

Apart from the fact that it is an excellent product, the customer support is simply absolute class I have rarely been treated so reliably and friendly very high praise.

I bought the rectangular filter set directly from K&F.
Since I worked with screw filters in the past and had the problem with vignetting when screwing several filters on top of each other, I wanted to buy a rectangular filter set for a long time.
Since the sets from NISI, Haida and other well-known manufacturers are very, very expensive, I was looking for a cheaper alternative as a hobby photographer.
When I saw several reviews on YouTube, my decision on the set from K&F which is half cheaper than that of Haida and CO.
I have absolutely no regrets about my decision so far.

The filter holder is very high-quality and well thought out.
I particularly like how the polarizing filter is attached to the holder and how it can be adjusted using the small wheel.
The filters themselves are made of optical glass and show no color cast and are also well coated.
It should also be positively emphasized that the filters are provided with a plastic frame with a tab.
This allows the filters to be inserted and removed without annoying fingerprints.
It comes with a bag to store and transport the holder and filters in it.
Various adapter rings for different filter thread diameters are also included.
As a landscape amateur photographer, I no longer want to miss out on the advantages compared to screw filters.

I have a clear purchase recommendation for amateur photographers and professionals!!!
I wouldn't have expected such excellent quality for this price.
It's amazing what K&F delivers here.

Product was well built and the filter glass was clear.

Placing of the order to the delivery was fast and the package was well wrapped; protecting the filter set and the glasses. It arrived in good condition.

Going to order and ND filter to compliment this set.

Just received the pro filter system. Went out to do some fine art shot down by the coast results are fantastic. Love my new system.

The quality of the manufacturing or the accuracy of the details and the attention to everything, big and small, my friend. Make sure that you have missed out on a lot of quality and savings with the final solution. One filter for all your lenses.