parec eun interesting set, quality and good price, good ergonomics, I miss an internal thread for a polarizer, plus a third rail for another filter, the rest is correct, although the filter misses the outer coating fabric for the edges, the one to remove by torches or outside lights.

Good ND Filter for the 18-135mm Sony E-Mount Lens

Used on a Sony Alpha 7III (FE mount), this ND filter is superb. The finishes are very good, the notched indicators on the ring allow you to calculate the number of stops.
I mainly use it for videos, I didn't notice any “cross” effect even at max.
It's confirmed!

I am using this filter for outside shots on an IR converted Canon 40D with an internal 720nm filter. The CPL helps to make the open sky even darker, and the ND filter gives me the flexibility to do some cool shallow depth of field shots when close to wide open in sunlight. I had to use a 52mm to 55mm step-up converter to fit the Canon EF 50mm 1.8 II (nifty fifty) lens, but this setup matches the barrel diameter perfectly so it's not unwieldly.

It takes a little getting used to, but the value of a high quality mount, ND filter and a full circular polarizer with several adapter rings makes it a bargain. I can even use it on my 14-30 NIKon Z Len 14mm 14-30 with no vignetting once properly attached. An awesome kit. The ND is excellent and neutral. Recommended.

This is tough to beat. Not only do you get a 100mm GLASS (not plastic) 10-stop ND filter, but you also get the filter METAL mount and multiple METAL lens adapters. Even if you need to buy step-up/down adapters because the ones included do not fit your lenses, this is still a bargain. Even though this comes in at well below the price of other 100mm 10-stop filters (without the mounting system), it performs excellently.

My unit doesn't produce any noticeable color cast, but I also shoot solely in RAW, so a color cast wouldn't be an issue anyway. The case for the filter is firm, so I don't worry about it very much when it's in my camera back, and the soft lining keeps the filter safe from scratches (so long as nothing coarse gets inside, of course). Better still, the filter mount features a second slot should you wish to use additional 100mm filters (e.g. graduated filters). I point out the size because this is the "standard" in these filters, rather than the more common 80-something mm ones you see in comparably-priced square ND filter bundles that use smaller, cheaper plastic filters instead.

The only issue I found, and this is really just nitpicking at this point, is that the filter mount never really feels very securely attached to the lens. The filter and mount won't fall off if the camera is moved or tilted forward, but the mechanism that attaches the mount to the lens adapter could be a bit tighter fitting in my opinion. Nevertheless, great product at a great price. Anything "better" will be considerably more expensive, and even then, how much "better" will it be?

The adapter works very well. No internal reflections. Lenses with an aperture follower also fit on it without grinding. The thread is suitable so that the markings also point upwards. The only drawback of the adapter is a bit thick and heavy but quite handy on the X-T3.

Excellent ND Filter !!