Lee Foundation Kit is available at B&H

[Richard Lane]

Awesome, I'm glad I could help! You're getting a really nice set-up there!

Remember, that you could probably still use your current regular 77mm screw-in CPL on the front of your lens, (I would take off the UV filter if you use one) and then attach the step-up ring to the CPL, and then the wide adapter ring, and so on. Of course the wider the lens, then the greater the concern of vignetting on FF, as you start to use the slots further out on the foundation kit.

Edited:
Of course this setup is a little less convenient, because if you want to take off the CPL, then you have to remove the foundation kit, as opposed to using the round 105mm CPL $300 which screws into the optional front ring $52 of the foundation kit with it's own adapter ring, or Square 4"X4" CPL $189 which fits in a slot on the holder, with no extra mounting hardware to buy.

http://www.bhphotovideo.com/c/produc...er_Filter.html

and

http://www.bhphotovideo.com/c/product/218398-REG/LEE_Filters_FP105_Accessory_Front_Thread_Adapter.h tml


or this:

http://www.bhphotovideo.com/c/produc...zer_Glass.html


When you're ready to discuss filters just let me know!

Have Fun,
Rich