Here is few pictures of what the Hitech Lucroit filter system looks like when mounted on the Canon TSE17 and Canon 14-24G. Both lenses has a weird front element that most filter system can't be used on them, and for landscape shooting, ND/GND is a very important piece of tool so I have been looking for a good filter system that can accommodate all these specialty lenses as well as any other lenses with the regular front filter thread, and I have tried so many systems and finally settle down on this Hitech Lucroit system, it's pretty well built overall, they have pretty much adapter ring for most of the specity lenses that you can't find much support from other system, which includes TSE17, Canon 14L, Nikon 14-24G, Sigma 12-24, Sigma 8-16, Tokina 16-28.......and bunch others. It's HUGE system, the filter size is 165mmX200mm, it's also pretty expensive, if you buy this system for a specific lens, the cost of this filter system with 3 or 4 filter and adapter ring and filter holder can easily cost more than the lens itself.

One thing I really like about this system is it's attached to the lens from the front, unlike the Lee system (the dedicated Lee system for the Nikon 14-24), I don't have to remove the lens to attach and detach the adapter ring, not much of a issue if you are shooting in studio or home, but out there on the trail, it's big problem, so I would much prefer a system can get on and off without having to remove the lens from the camera. However, for the exact same reason, the Lucroit adater ring is not as smooth as the Lee as you need to rely on the friction between the ring and the lens to make it stays on, while the Lee adapter ring is insert from the back of the lens and there is a retaining ring coming from the front to secure the ring, so each system has its pros and cons, neither one is "perfect" but I personally like the Hitech Lucroit system a lot more.