K&F CONCEPT 77mm Blue Streak Lens Filter Rotating Circular Anamorphic Lens-Optical Glass Style Blue Streak Special Effect Filter 2mm Spaced Streaks for Camera Lens (K-Series)

Excellent

This filter makes all lights streak in the dark.If done well, it can help create the anamorphic look but requires angling the filter well. If done poorly, it can make the footage look cheap as if the lens was dirty.Overall this is a great way to easily spice up some night scenes.

I use this filter on my wide 16 mm lens to create a faux anamorphic look it worked very well. The quality of the glass is excellent and the metal construction holds firm to the lens. Image quality looks great especially at night.I was able to rotate the filter to the appropriate horizontal position

I think this is a fun filter for music video projects and some creative and experimental shoots but this does NOT present that same natural flares from an anamorphic lens. So don't get this hoping to get that spherical lens to produce consistent flares like that of an anamorphic lens. What I do like about this is that you can get some really creative shots and looks by turning the filter element to have streaks run vertically, horizontally, and diagonally. Another cool thing is that if you pair these with an actual anamorphic lens, you can get some really fun and interesting effects. So it's great to have in your bag/kit, especially if you are in the realm of experimental and music video cinematography.

I found this filter to be a lot of fun and the price tag does not break the bank. It is made well with good quality glass. It threads on easily and the “streak” part rotates. I found the rotation to be spot on – not too tight and not loose or sloppy. The “streaks” to my eye emphasize the blue and green color ranges, but you do notice the effect in all colors. It just isn’t as emphasized in other colors. It does come with a case (always good for me as I carry gear regularly and need a way to protect it). I did do some pictures during the day with the filter, but found that I like more of the darker shots to highlight the effect. I did not notice vignetting, distortion, or unwelcome artifacts with the filter. I would recommend it, and I’m enjoying using it.

I used this with a 28-105mm f4 and a 50mm f1.8 both on my Lumix S5IIX. I really like the effect and I think the best use case is artistic portraits. Being able to smoothly rotate it is also nice. And it even rotates smoothly so that you can use it in a video if you want. That has a pretty trippy effect either to do a subtle flair shift or a full rotation. Some things to keep in mind are that you cannot really control the amount of flair. You might have some control with an ND filter, but that may be challenging since this mostly seems suited for night-time shoots. The other thing to keep in mind is that this is a blue streak filter, meaning that it will shift warm light sources to cool. You can see how this works in the pictures. See that the effect is most natural for the post light that is already cool.

This filter gives off an amazing look. Obviously it's hard to fake anamorphic but this gives off really convincing anamorphic light streaks. I love using it for concerts where there are a lot of point source lights. I also really like the yellow streak filter they have!

This filter got stuck on my lens not because I screwed it too tight but because something was up with the threads on the filter. Had to go to the camera store for them to use a filter wrench and remove it.