K&F Concept 67MM Blue Streak Filter, Anamorphic Lens Effect Filter, Ultra Slim Optic Glass Multi Coated, for Camera DSLR Cinematice Video (Nano-K Series)

I'm always happy to try a new (to me) filter effect with my camera, and this one is pretty neat. The filter is supplied in a shrink-wrapped box, accompanied by some individually packaged microfibre cleaning cloths. Inside the box, the filter comes with a hard case, with a secure surround that stops it from sliding around.The filter has blue lines painted onto the glass, and a two part moving structure. The back screws on to the camera lens, whilst the front rotates, allowing the angle of the blue lines to be changed to optimise and change the angle of the streak effect. I ordered this in the 67mm size to fit together with a Lumix lens on my Panasonic S5IIXCE. The fit is good - I've not yet had an issue with this brand, and (amongst others) own several of their filters. The screw threads connect simply and without issue - although I did find doing this little fiddly before I realised that the front part of this filter rotates!Having this filter installed doesn't, unlike some, alter the size of the lens cap needed, so the regular 67mm cap size can still be used with it.The effect makes a single blue streak from one, small to middling sized bulb or light, and multiple streaks when there are more. I would have been happy with this if I had paid for it.

I am a massive fan of K&F products but this is a rare example of something I am indifferent about.As a film maker I shoot a lot with Anamorphic lenses and even have a set for my iPhone, but occasionally I like to shoot stuff just for me without the effort of dealing with de-squeezing the footage later.I was curious as to how well this would perform so placed an order.Sadly results have been something of a mixed bag, the filter is far from able to give you that anamorphic blue streak look in every scenario, sure, a nighttime street scene with streetlights and car headlights, you will get an approximation of the look, but try shooting a single light source such as a candle and it is a different story with either nothing visible or worst case, you can see the blue lines of the filter dependant on lens and focal distance.I will use it again but it doesn't inspire me.