K&F Concept 67mm Variable ND2-400 Filter + Lens Cap +Cleaning Cloth, Slim ND for Camera Lens

K&F is rapidly becoming a major player in the photography accessory industry and is now a brand I can trust and look-out for.IN a recent trip to Italy I was using my Sony A7C coupled with a F1.8 prime lens but soon found that even with a very fast shutter images were completely blown-out. With this lens you can reduce light input even in bright light.This lens is VARIABLE… meaning you can keep this attached in all conditions too! This feels very well made.This is an awesome kit which includes a lens-cap and cleaning cloth.. awesome!At 20 quid RRP this is a great purchase

I will say at the outset that I'm a huge K&F Concept fan. I think they're bringing amazing technology and photo/video accessories to market and I've never once had a bad experience with any of their items so you know it's a brand to trustThis variable ND filter is another example of how to put together a cracking product that is useful, has everything you need, and offers great value with an ND2-ND400 filter in the package along with a lens cap and cleaning cloth too.The fact this filter goes all the way up to 400 is a game changer. A really fantastic way of shutting out the light enough to use wide open lenses in the brightest of days with easeIt's very well constructed, feels strong and solid, attaches easily, and has no real colour changing aspects to the pictures you will getThe lens cap is a bonus as it offers protection for your new filter tooThe results I've been getting with this filter are not just really great but fun too as it opens up a myriad of new shooting opportunities in brighter sunlight, and when used for video you can get a natural motion blur by turning up the ND values a little until you have it nailedI keep saying it but K&F Concept are now one of my favourite brands and this is just another example of how they do things brilliantly well.Great product

It's a great VND just to be able to adjust if i need my subject to be darker or brighter.

This product comes in a plastic wrapped cardboard box that encloses a plastic case which houses a 'cap keeper', the filter and the lens cap, together with a separately wrapped lens cleaning cloth. I personally think that it is a little overpackaged for what you get, but that is my opinion.Now to the quality of what you get:1: The 'cap keeper' - this seems pretty pointless to me and, in my hands at least, is not likely to make any difference to whether I would lose the cap or not.2. The cleaning cloth - always useful, although I have kept this fully wrapped at this stage until I need it, so I cannot really comment on the quality of it until I come to actually use it.3. The plastic case - This is a good quality box that is robust and comes with padding to keep the lens and cap secure.4. The filter - This is quite weighty compared to other filters. The mechanism turns very easily (although not so easily that your setting might change by accident) and the glass is clear and free from imperfections. The build of this filter feels very good. I have not used this type of filter before and I feel that it will take some practice to identify when it is best to use it.5. The lens cap - this fits the filter perfectly and the unclip mechanism is both tight enough and easy enough to remove at the same time.A very good quality product.

This K&F Concept 52mm variable ND2-400 filter is basically two linear polarising filters that you can rotate so that the level of extinction between them varies from a factor of 2 to almost complete extinction with a factor of 400. This is particularly useful if you are trying to increase exposure time without having to stop down the lens because depth of field is also critical.Normally, you would use a fixed absorption filter such as an ND16 or an ND64 but you end up carrying around with you a number of filters which can soon build up the cost of your filter stock. The variable density ND filter allows you to select the absorption that you need in only one filter.However, the catch with using polarising filters like this is if you don't want your shot to have a polarising filter used in it such as if you were taking a photograph that included reflections or areas of the sky - both of which produce naturally polarised light. Additionally, when you have a polarised light source such as clear blue sky or that involves source light passing through panes of glass or plastic, you can end up with unwanted colour banding.This variable ND filter increases the lens filter size - it is a comparatively thick filter as it has two sheets of filter for light to travel through - so, for wider angled lenses, the increase in filter size means that the chance of vignetting is reduced substantially. With this in mind, you are also supplied with an additional lend cap.A nice, sturdy filter as long as you understand its limitations.