[72 mm] This filter has a fantastic look ad I use it a lot more than I thought I would.

[Glass] After reading some reviews, I was hesitant to purchase. So far, no trouble with it. In fact it has made some of the most difficult situations easier to shoot in.

[Blue Streak] Ótimo filtro, muito boa a qualidade optica.

[Blue Streak] This is a really great filter for effects shots. If your using this filter with studio lights be mindful of your light positions. If they are really close to the camera you get less streak(so I discovered). If your lights are afurther from the camera(15-20 feet) you get more streak. It's a must to have a matte box with a rotating filter holder with this product so you can turn the streaks any way you want them. It's a neat filter, I'm looking forward to using it again.

[72 mm] A filter like this is a MUST HAVE if you want to level up how your images (for photography and video) look in broad, intense daylight in one fell swoop.

They reduce the overall amount of light coming in the camera so you can stop down for a beautiful optically blurred out background and heavily reduce intense sunlight reflections, virtually adding dynamic range in daylight. I knew this would help my shots but my jaw dropped when a got the footage back from testing locations for a project, with and without. (attached photos are screen grabs of video. Shot on Sony A74, Sigma 24-70 f2.8) *Note: This is my first ND filter and first polarizer.

My testing has found a slight cyan cast in the area where sunlight can hit the lens where shadows can be seen, it looks almost dreamy and I kind of like it, but not perfectly color preserving. With Nano-X Pro, I have not encountered any dark X pattern no mater how I adjusted it, which is far better than most Variable ND + Circular Polarizer filters on the market. The included pouch is made of materials that feel great in the hand and its pull tab that makes the filter rise out of the pouch is a very nice touch that makes me wish K&F Concept included this pouch with more filters and also sold separately. I want other filters in these things! (Wile they do sell other pouches. They do not sell the ones included with these filters.)

If you are on the fence and don't have a ND or polarizer, just get it. It took a while for Polar Pro to finally release something like this, and the price of this one STILL undercuts it. If you are a videographer/photographer, image quality is super important and this is a fantastic tool to help you properly expose your shots. There is a reason why Directors of Photography have built in ND filters on their wish list for their cinema cameras and this is why, it makes their job so much easier and allows them to focus on building the look that they want.

[Aluminum] Works great with Leica D-Lux 8

[Blue Streak] I have used this product for a music video and it worked very well. The streaks are not over powering but very good looking visually. I would recommenced this product to any real professional, a great weapon in my matte box arsenal.

[Blue Streak] This is a really cool pice of glass. If it's used with lots of lights you get that music video look. I cant really think of a use for this filter outside of a studio or well lit background. I have used it once so far and I'm very happy with my results. It is a bit pricy but all 4X4 filters are. I would not use/or buy this unless you have a matte box with a rotating filter holder. That is a MUST for this product.

[72 mm] thank you it's the same

[72 mm] I filter a lot and have found it to be a kind of secret weapon for my clients, who can see I'm getting images my contemporaries can't. I have a lot of car clients and generally shoot small to medium budget online spots. The blue streak can be done in post no doubt, but in camera it is just magnificent. Very cinematic! You can't use it all the time though! So it's a lot of money for a trick you can only pull every now and again... but what a trick it is!