I purchased this filter because of the claim that the color balance is more natural than other CLS filters. However, they fit very sloppy in the camera. The first one will fall out when you take an exposure. I purchased a second to see if I originally got a defective one. The second is more snug, however it still shifts around in the camera body. I should note that I have 2 clip in filters from Astronomik that fit perfectly with no slop or play at all.