There are so many creative possibilities with the K&F Concept 58mm 18 piece set of round filters.​What are you buying?18 round color and graduated filters that fit in 3 different pouches. Each pouch holds 6 round filters each (this is starting to sound like math class!). Half of the filters are graduated filters (the top half has color and the bottom half is clear) and half of them are full color.These filters screw right on top of your lens. Make sure that you have a 58mm lens before ordering these. They are lens size specific. Every lens has different diameter sizes. If you look at the rim of your camera lens, you will see a circle with a line through it and a number followed by mm. Mine is 58mm. It's not a buy one size fits all. This filter is a 58mm size.Why would you use these? To be honest, most people would add effects like this in photoshop, but many people can't afford photoshop or have no clue how to use it. These filters allows you to be creative with your photography without the need to do post color touches. The graduated filters do take some adjusting to get just right. The graduated filters easily turn back and forth on the lens without unscrewing the entire filter from the lens. The ease of adjusting makes adjustments to exactly where the graduated color starts much easier.Ideas for these filters:- Sunsets!! Take a purple or red filter, or even a graduated filter and take some photos of the sunset. The color will absolutely pop.- Another reviewer had a great idea (Matt) - Put your camera in black and white mode and use different color filters to add contrast.- Skies - Use blue for the sky on overcast days to give it more color.- Use the graduated black/gray filter for days the sun is dazzling on the horizon.- Green - to make grass green. It is November in Texas, and the grass is turning brown. The green filter made the grass look green again!- Mood - Different colors will give you different moods in your photos. Imagine turning a photo blue for a cool and cold mood, or red for an energetic mood, especially at night.There are many uses for these round color filters. The pouches these filters come in bend into three and then velcro shut. Each section of each filter has padding. Each filter comes with plastic wrap sealed for protection.I have a Canon 60D and I used these filters on my kit lens and I did not notice any blurring with these filters. See photo for a before and after using the graduated filters on a (weak) sunset.This 18 piece round filter set offers endless creative photographic possibilities!Disclaimer: I received a sample of this product at a discount in exchange for a detailed and honest review. My ratings are honest, and I rate according to how the product performs (as you can see by my past ratings).