I am. now officially a K&F fanboy as I'm yet to be disappointed by anything from them, this being no exception.
Usual manufacturing standard are maintained, if that's not stating the obvious, I just need to find the occasion to use it properly now.
Test shots of a candle at home are enough to convince me it works but I'm looking forward to having a shoot booked where I can give it a proper outing.

Filtro effetto prisma per obiettivo fotografico ɸ 52.
Il prodotto arriva ben custodito all'interno di una scatola rigida in plastica e al suo interno è completamente avvolto da una sede in schiuma; oltre al filtro, nella confezione troviamo 3 panni in microfibra per la pulizia della lente.
Preso per la mia Nikon D5200 monta perfettamente sia sull'obiettivo standard 18-55 ed anche sul 55-200, è davvero molto facile da montare e non arreca il minimo disturbo durante l'utilizzo è possibile montare il paraluce molto velocemente, ciò vale sia per quelli ad incastro che quelli a baionetta.
Lo utilizzo principalmente per fare foto di sera barra notte pr poter sfruttare al massimo l’effetto del filtro.
L’effetto che riceviamo fotografando le fonti di luce è come se si illuminasse un prisma o anche più “scherzosamente” è come un effetto “astigmatismo”, il che da un tono particolare alle foto.
Il vetro K9 garantisce un'elevata trasmittenza luminosa e altrettanta resa cromatica, garantendo un’immagine chiara e di qualità.
Realizzato in lega d'alluminio aerospaziale sabbiato, la finitura opaca evita anche i riflessi e la penetrazione della luce diffusa, garantendo un grip davvero alto ed inoltre si ha anche la possibilità di poter ruotare il filtro grazie ad un cuscinetto integrato e la rotazione è fluida e da abbastanza resistenza al movimento che ci aiuta a fare un movimento fluido nel caso si sta riprendendo piuttosto che fotografando.
La parte del filtro che va ad avvitarsi sull’obiettivo è anche provvista di dentatura su tutta la circonferenza in modo da favorire al massimo la presa durante il montaggio/smontaggio; sulla parte frontale invece è presente una sede per poter agganciare il tappo copri-obiettivo.
Unica pecca: con fotocamere entry level o con obiettivi che hanno una bassa luminosità, se lo si utilizza di sera/notte si potrebbero avere dei problemi con il focus automatico.
In conclusione: ottimo prodotto, consigliato!

I Have ordered several K&F special effects filters in the past and have found that they can add to your creativity if you take the time to learn how to use them.
This Starlight Glare filter will be used in many of my landscape shots. More often than not I have been moving away from adding special effects to my photos when downloading to my computer. With these types of filters, I find it more interesting to get those effects in the field and to be able to tell people honestly, they were not “photoshopped”. As with all the K&F filters I own, I’ve had no problems with attaching them to my lenses and are well made for the price.
As always, it’s a nice touch that they include a couple of cleaning clothes in the box to care for the filter.

Another great filter from K&F! The material quality is great. The filter is lightweight, and attached easily to my Canon lens. I really liked this starlight glare filter.. it adds a little razzle dazzle, without being as over the top as my starburst filter. I especially like using it with fabric that has sequins.

Of course these aren't filters that will live on your lens or maybe not see as much use as a black mist filter, but when these do come into play, they produce some really nice flaring and bokeh effects - especially when paired with anamorphic lenses with a 1.5 squeeze factor or higher. The effects are best described as creating a dreamy effect or dazzle which is wonderful for product photography or cinematography to make your product really pop. Build quality is nothing short of fantastic and reliable. Simply great.

Adds a cool effect to my photos.

I Have ordered several K&F special effects filters in the past and have found that they can add to your creativity if you take the time to learn how to use them.
This Starlight Glare filter will be used in many of my landscape shots. More often than not I have been moving away from adding special effects to my photos when downloading to my computer. With these types of filters, I find it more interesting to get those effects in the field and to be able to tell people honestly, they were not “photoshopped”. As with all the K&F filters I own, I’ve had no problems with attaching them to my lenses and are well made for the price.
As always, it’s a nice touch that they include a couple of cleaning clothes in the box to care for the filter.

I got the 49mm one, and it was a perfect thread match.

Well constructed, comes with cleaning cloths too (nice perk, I have a tendency to losing these)

Sure you can achieve the same look in post-production, but when you can get the desired effects from a filter in-camera, why wouldn't you?

I own a lot of K&F filters. They are well made and fit like a glove. This filter is no exception. I like the effect this filter gives, and it is nice to have for evening shots. I highly recommend it!

We film a lot of videos and take tons of photographs for our youtube channel, well travelled life. This star light effect filter in 77mm is perfect for the Canon lenses I typically use when travelling. A perfect use is night time photography as an alternative to black mist filters. It does what the name suggests adds light effects emanating from any bright highlights. Used subtly, it can add interest to anything from urban scenes to Christmas markets. K&F filters are well made and I have a number of them in my kit bag. Highly recommended.