So far no light has come out. I like the frames to get 100x100 and 150x100 for my additional filters. It keeps fingerprints out of the filter.

The company is based in Hong Kong. I would have liked to have additional adapter rings, but K&F Concept doesn't sell them separately it seems. I contacted her through her website/email and continue to receive ads for her backpack. I have been asked to get magnetic adapter rings which will not work with this system. It looks like if you want to get adapters you need to purchase the portafilter and adapter rings.

This is definitely a product to buy. I can't wait to take photos with it. It would be nice to have a wide angle lens hood.

The quality of the filter is very good. I would have liked to have bought the filter without the holder and rings.

They screw on pretty smooth it have a quality threads, and it work just fine. Perfect for someone who's only going to be casually using their step up rings, I am a professional photographer & I was looking same filter Ring Adapter & I order this product which is very helpful for me when I use multiple filter with my Nikon 5300 camera lens. During photo-shoot many time we have to change camera lens along with filter also, so using this ring it is very helpful for me, these rings get there job done, and don't get stuck. Please note - these are step-Up rings also have Step Down Rings total 18 rings.

Top-quality, smooth mounting, very light.
I recommend this set of rings!

It seems like an easy system especially if you can get magnetic rings for same size filter on different lenses

Bought for a Sigma Art Sony 24-70 and the Sony 28-135 (with Step Down), it is now permanently on my lenses. Additionally, having an ND and a polarizer on the same filter is a really nice surprise, especially at this diameter. For video recording and holding at 1/50 or 1/100 in broad daylight, this is best. A highly recommended essential.

Bought for a Sigma Art Sony 24-70 and the Sony 28-135 (with Step Down), it's now permanently on my lenses. In addition, having an ND and a polarizer on the same filter is a really nice surprise, especially at this diameter. For video recording and keeping at 1/50 or 1/100 in broad daylight, this is the best.
A highly recommended essential.

These are some pretty good rings.