From Lensandshutter.com

I really loved trying out Tiffen’s new XLE filter line! If you are looking for a hardworking ND filter for your creative long exposures or shallow DOF daylight shooting, these are the filters I would suggest.

The mid and top range filters in the line, the Axent and the Apex do an excellent job of not only cutting light, but also preventing near and far infrared light pollution in your images.

This means that you can avoid colour shifts in your images that can sometimes happen when doing long exposures on today’s imaging sensors.

Overall, no photographer should be without a good ND in their kit, and these are certainly a fantastic option.