Non-front rotating focus

How can I tell if a lens has a front rotating focus? I bought a Cokin system to put on my kit lens only to findout I needed to be using a front rotating focus.:o

Yours does. If the front element of your lens rotates on the outside when it focuses, it has front rotating focus. The Cokin P series should work on any type of lens though. You've got nothing to worry about.

when I put the holder on it turns with the lens. Isnt that going to throw off the GND?

ChrisBlaze wrote in post #2281232
when I put the holder on it turns with the lens. Isnt that going to throw off the GND?

So turn it back to the proper position after you lock your focus in

Remember this kind of filter is mainly for landscape, with a tripod. Use manual focus to get total control over where your focal point is, and adjust the filter holder when focus is set.
Remember to meter with the filters in place.