Fitting the holder onto the lens is as expected. Much like the Haida and Nisi holders, the adapter ring is screwed to the front of the lens and the holder fits on. The Haida holder became a bit fiddly and annoying after a while as you had to line up the arrows to allow the bayonet fitting to attach before locking on with a screw. The Nisi holder is much like the Lee; a spring clip with a knurled knob, which you pull out and clip on. The Kase holder has the best of both. It clips on much like the Lee and Nisi, but once on you have the knob on the side to tighten, which removes the chance of it falling off and also cuts out vibration when windy. The polariser is beautiful. You simply offer it up to the adapter ring, it pops in and is held in place by magic. No fiddling about trying to line up a thread. The holder also has a gasket fitted so no need to have any on the filters, meaning no light leakage when doing long exposures.
The adapter ring fits so close to the lens, due to it’s design, that there is no chance of vignetting. There’s a tiny amount on my Tokina 11-16mm at 11mm with the Nisi holder, but it’s very tiny. The Haida doesn’t fare so well and I had vignetting at 12mm. With the Kase there is literally none. Even with 3 rails fitted there’s no sign at all which means I can go fully wide with no extra work to do in post processing.
The rails seem to be a combination again. They grip on the edges of the filter but guide on the sides. Nisi grip on the edges but were a bit fiddly finding the bottom of the guide when sliding filters in. Haida were more traditional and gripped on the face but you have to tilt and wiggle the filter to get it to slide down. Kase seem to have got it right with their rails; plenty of grip but nice and smooth when inserting the filters.
As for the filters themselves…
I’ve had a bit of a loss of enthusiasm for photography for a while. I wasn’t producing images I was happy with. I was having to ‘work’ my camera and filters to get what I wanted from the scene and as a result, having to do more work in post processing. It’s not how I like to work. Using the Kase filters has renewed my enthusiasm. I can work as I like to work again.
Quality wise, they’re on a par with Haida; optical glass with a nano type coating, (Kase call it nanotech) which repels water, dust, is anti-reflective, anti-glare and scratch resistant. The main difference is Kase are stronger. The blurb says ‘virtually indestructible’ but I have it on good authority that they are breakable but less breakable than others. If you drop one on it’s edge on a rock, chances are it will break but you have a couple of lifelines before it’ll shatter. I’m not about to test it out though.