I use these on my Canon 6D with 24-105MM EF-L Canon lens. For the price you can't beat this deal. The filters screw into the lens nicely and I don't detect any aberrations in color or sharpness. They are real glass!! I'm sure there are better filters out there if you want to spend the money but these are OK for my purposes. I bought this set because I wanted a clear/UV filter to protect the front of my lens and I wanted some ND filters for time exposure stuff. These work perfectly. The extras are really a bonus... The nice Velcro closure case, with everything fitting well, an extra lens cap that seems as good as the OEM one (who doesn't need an extra lens cap?) and an extra lens hood. The lens hood screws into the lens or filter threads, so it isn't like the Canon twist/lock lens hood but this hood has good threads plus a nice "lock" ring that threads back down against the lens ring/hood to hold it securely in place. When it's time to remove the lens hood simply back off the threaded ring and unscrew the hood... very simple and effective. Sheesh, for the price, unless you just really need expensive filters this is a killer deal!