K&F CONCEPT 77mm Side Lever Variable ND Lens Filter ND2-400 (1-9 Stops)

★★★★★ Great quality ND filter for the priceI picked up the K&F Concept 40.5mm ND filter for my compact camera, and it has exceeded my expectations. The optical glass is very clear with little to no noticeable color cast, which is something I was concerned about before buying. The multi-coating does a great job minimizing reflections and makes it easy to keep the filter clean.The filter threads on smoothly, and the slim design doesn’t interfere with the lens or create any vignetting. It has been perfect for slowing down shutter speeds to capture smooth waterfalls and adding natural motion blur in bright daylight. It’s also been excellent for shooting video while maintaining a more cinematic shutter speed.For the price, the build quality feels premium and performs just as well as filters that cost significantly more. If you’re looking for an affordable ND filter that delivers sharp images, reliable performance, and solid construction, I would definitely recommend this K&F Concept filter.

great product, easy to use and great quality

I use this 77mm variable ND filter every single day, and for the price, it is absolutely perfect. It holds up great under heavy, daily use and delivers exactly what you need without breaking the bank. If you need a reliable, budget-friendly VND that you can depend on daily, this is it. Highly recommended!

Excellent product

Camera - fx3 in slog3 shooting in 4K 4:2:2 10bit 24fps 1/50, 640 iso f1.4 on a 40mm sigma art.With the nd set on its darkest setting with the above settings on a very bright day it’s slightly over exposed with the aperture wide open. If I close it a little to f2.8 it’s a little under exposed in which i need to open the nd filter slightly.This does work really well for video work, it does have a slight color cast but it can be remedied either by adjusting your wb or just fix it in post. It’s negligible if your shooting in log. It doesn’t have hard stops so it does have an x if you go past the working ranges. And if you’re new to ND filters without stops, this doesn’t mean that the filter doesn’t work, it just means that you have to pay attention not to go past. Another thing worth noting is that the markings on the filter are not accurately lined up so it’s best to just either make your own markings or make notations on the ring to tell what is fully closed and what is wide-open without the X appearing. It’s honestly a great ND filter minus the lack of hard stops. The only other annoyance is that it doesn’t come with a cap but K & F does sell one for their older models that will fit this newer model, but you will have to cut a notch in the cap for it to fit correctly. I added a picture of this. I chose this over going with a polar pro due to cost effectiveness, and I’m not upset about it. There is another version of this filter that goes one stop darker up to nd1000 that I was considering getting. But my fastest lens is a 1.4 prime. If I had anything less than that and I wanted to shoot wide-open I would get that filter instead.

Super funcional

Well made, works like a champ.

Pretty good the only thing is, I would love to have clicks instead of it free spinning, but it gives you more room to play with it. Overall, the quality is excellent.

After several months of use, the filter has a stain in the middle that distorts the image quality by creating color discoloration, the stain cannot be cleaned because it is created between layers that can be seen in daylight.Impossible to contact the seller.There is no warranty policy.

Exceptionnel produit

K&F Concept è sinonimo di qualità. Avevo già in corredo altri loro filtri, seppur abbastanza vecchiotti e con diversi anni di servizio alle spalle. In virtù di un mio imminente viaggio fotografico, ho deciso di optare per qualcosa di nuovo, affidandomi sempre a loro. Vi indico nel dettaglio quali sono, a mio parere, i pro e i contro di questo nuovo loro prodotto.Innanzi tutto il packaging è davvero ottimo: la scatola è in cartone assai robusto, impossibile anche da piegare, piacevolissima poi l'apertura magnetica. Il filtro è conservato in una custodia in similpelle con chiusura magnetica e non in plastica, il che dà al prodotto una rifinitura che possiamo definire "premium". All'interno, avvolto in un sacchetto protettivo, il filtro. Si tratta di un pezzo abbastanza pesante, già al tatto restituisce un'ottima impressione. Il corpo è in alluminio, i vetri sono di ottima finitura. Molto sottili (e questo è un bene perchè così si riducono le eventuali perdite di nitidezza), impermeabili ed antigraffio. Piacevolissimo (e utilissimo!) il cosino arancione che serve per poter variare l'intensità del filtro stesso: l'unico neo è il non avere una corsa limitata durante la rotazione, ma non è un grosso problema, dal momento che i limiti ND2 ed ND400 sono indicati proprio sull'estremità del filtro stesso. Ad ogni modo, il filtro è stato costruito in maniera tale che, anche sforando i limiti, la fastidiosa ombra ad "X" non si presenti. Per il momento ho avuto modo di provarlo solo in città in una giornata un po' uggiosa, nei prossimi giorni spero di integrare questa mia recensione con altri scatti in montagna.A chi è indirizzato il filtro? Sicuramente a chi ama la fotografia di paesaggio o per chi ha il desiderio di fare lunghe esposizioni in città (restando nei limiti dei 9 stop): certo, il prodotto non è il più economico sul mercato, ma basta provarlo per un po' per capire che vale ogni centesimo speso. Non sono un professionista della fotografia, ma per il mio uso va più che bene.

Ja super!Ik kan nu video's opnemen met de Sony A7IV en de Sony 200-600 mm op een zomerse dag in de zon.Door te draaien aan het filter wordt het beeld op de camera direct lichter of donkerder.De hoes vind ik wel te groot, past niet in je spijkerbroekzak op je kont, dus moet mee in jaszak of een tas.Heb nu een cd blik gevonden waar deze met wat bubbelfolie perfect in past en zo mee kan in mijn broekzak.

150-600mm F5-6.3などの大口径レンズで使用しています。超望遠レンズは鏡筒が長いので指先だけでリングを回すのは困難ですが、この製品の「つまみ（プッシャー）」は非常に使いやすく、画角をキープしたまま指一本で露出を微調整できるのは動画撮影において大きなアドバンテージです。一方で、95mmという大口径ですが、可変NDの構造上、広角側だけでなく超望遠側の特定の焦点距離でわずかに周辺減光が目立つことがあります。また、ND2-ND400という広い可変域を持っているものの、最大値付近では特有のX状のムラが発生するため、実用的には5〜6ストップ程度までと割り切った運用が必要です。最新のカメラの低照度性能を活かしつつ屋外の強い日差しの中でシャッタースピードを固定したい動画撮影において、この操作性の良さは代えがたいものがあります。こうした特性を理解して使用すれば、非常に強力なツールになります。