Top 20 Best Nd Filter Nikkor 50Mm Test, Review & Comparison

We all want the best for our money, but how do you know what a good fit is without research? When looking into buying something that will likely be an investment and part of your everyday life – like nd filter nikkor 50mm, it makes sense to spend some time getting educated on where exactly this product falls within its market space.

The future of the best nd filter nikkor 50mm is here, and we’ve got all the best picks for 2025. We have compiled 28638 reviews from top experts that led us to these 20 devices on the list.

The Best Nd Filter Nikkor 50Mm Deals This Week: 

Bestseller No. 1
ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF-S NIKKOR 50mm f/1.4G f/1.8G Lens
  • ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF-S NIKKOR 50mm f/1.4G f/1.8G Lens
Bestseller No. 2
58mm Variable Neutral Density Filter for Nikon AF-S NIKKOR 50mm f/1.8G Lens
  • This Variable Neutral Density filter provides 2 to 8 Stops of light control. It reduces the amount of light passing through the camera lens without changing the color of the scene and are especially useful in bright light conditions to help prevent overexposure. These are must-have filters for landscape and nature photography
  • Variable Neutral Density Filters - Allows proper exposure at a wider lens opening for reduced depth-of-field - Highlights a key subject by making the foreground and/or background out of focus - Rotating Ring to choose degree of ND
  • Your camera's lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. This number is always preceded by a "Ø" (diameter) symbol. For example: Ø58 = 58mm lens thread size
  • Compatible with Nikon Lens : AF-S NIKKOR 50mm f/1.8G Special Edition Lens
Bestseller No. 3
JJC 52mm Variable Neutral Density Filter ND2 to ND400, Slim Fader ND Filter for Canon EF-M 55-200mm f/4.5-6.3, Fujifilm XC 15-45mm f/3.5-5.6, NIKKOR Z 24-50mm f/4-6.3 Lens& More with 52mm Thread
  • 【Usage】The Variable ND filter allows you to shoot wide-aperture lenses in bright light without overexposing and shallow depth of field while under lighting conditions that exceed the shutter speed capabilities of the camera. A good partner for you to record movement in subjects such as waterfalls, vehicular traffic, seascapes, streams and clouds.
  • 【ND 2 - ND 400】2X to 400X filter factor provides an exposure reduction of 1- 9 stops. You only need to carry one ND filter with you to get a variety of darkness levels.
  • 【X Cross】Due to the design of the filters, as you approach the maximum ND setting, you can get a cross pattern across the image. This is remedied by dialing the ND setting back a bit.
  • 【Multi Nano Coating】16-Layer Nano Coating makes the filter anti-scratch, anti-fingerprints, anti-static, oil and water-resistant. The filter is constructed from high quality Japanese glass for increased optical clarity and color fidelity. Slim design with 0.28” aluminum frame helps minimize the potential for vignetting.
  • 【How to choose the right thread?】Compatible across all lenses with 52mm lens thread. Please verify your camera's lens thread size based on “Ø” marking on lens barrel or underneath lens cap before purchasing. For this 52mm ND filter, the lens cap/hood should be 55mm.
Bestseller No. 4
JJC Multi-Coated 46mm UV Filter for Nikon Z50 II Z50II Z50 Z30 Z fc Zfc with Nikkor Z DX 16-50mm Kit Lens, for Panasonic G7 with Lumix G Vario 14-42mm Kit Lens & Other Lenses with 46mm Filter Thread
  • Helps absorb ultraviolet light and reduce the bluish cast of daylight
  • Helps reduce dust, moisture, and scratches from reaching lens elements
  • Crafted from 0.03" Japanese famous optical glass, double sides 12-layers of multi-resistant coating prevents internal ghosting and reflections while providing over 99.5% light transmission
  • 12-layers of multi-resistant coating also offers greater protection to the filter substrate and helps it to stay clean for longer than with uncoated UV filters
  • Ultra slim design (only 0.12" thick) to avoid vignetting on wide angle lenses
Bestseller No. 5
Ultraviolet UV Multi-Coated HD Glass Protection Filter for Nikon AF-S NIKKOR 50mm f/1.8G Lens
  • The most essential filter you can own. This filter can be kept on your camera lens at all times.
  • Used for protecting your lens against dust, moisture, fingerprints, scratches and damage.
  • Provides basic reduction of ultraviolet light. Helps eliminate bluish cast in images.
  • Ideal for use with and without lens hoods. Quick and easy to attach and remove.
  • Helps create clearer, more accurately vibrant photographs.
Bestseller No. 6
K&F Concept 49mm Variable ND2-ND400 ND Lens Filter (1-9 Stops) for Camera Lens, Adjustable Neutral Density Filter with Microfiber Cleaning Cloth (B-Series)
  • 【Import Optical Glass】Crafted from premium AGC optical glass with 8 multi-layer coatings, this ND filter reduces reflections and glare, ensuring superior image quality.
  • 【Versatile Light Control】With 1 to 9 stops of adjustable light reduction and 360-degree rotation for precise dimming settings, this filter is perfect for diverse scenarios. (Note: Max stops may cause a cross-pattern effect, commonly known as an "X black cross." This phenomenon is natural and temporary, occurring due to the adjustable ND filter's interaction with specific lenses and focal lengths.
  • 【Glare-Free Surface】Treated with an oxidized sandblasting process, this filter prevents unwanted stray light and minimizes unnecessary reflections on the metal surface.
  • 【Slim and Secure】At a mere 7.4mm thickness, the CNC-patterned design ensures enhanced friction while rotating, making it easy to attach/detach lenses and accessories anytime, anywhere.
  • 【Compatibility Note】This ND filter suits all 49mm lenses. Check your camera's lens thread size (usually beside a "ø" diameter symbol) before ordering. Additionally, a 52mm lens cap is required for this 49mm variable ND filter.
Bestseller No. 7
Altura Photo 72MM Lens Filter Kit - Includes 72MM ND Filter, 72MM Polarizer Filter, 72MM UV Filter - UV, CPL Polarizing Filter, Neutral Density for Camera Lens with 72MM Filters + Lens Filter Case
  • Lens filter kit includes: Neutral density filter 72mm, 72mm polarizing filter & UV filter 72mm (UV, CPL 72MM polarizer filter, ND filter 72MM ND4) for camera lens + Filter pouch.
  • High-quality optical 72mm camera filter kit for lens protection and image enhancement. Includes a padded protective pouch for safe storage and travel.
  • Lens Compatibilities: Popular 72MM Lens models including Canon RF 24-240mm f/4-6.3 IS USM, Canon EF 35mm f/1.4L II USM, Canon EF 50mm f/1.2L USM, Canon EF 135mm f/2L USM, Nikon AF-S DX NIKKOR 16-80mm f/2.8-4E ED VR, Nikon AF-S 24-85mm f/3.5-4.5G ED VR, Nikon AF-P DX 10-20mm f/4.5-5.6G VR, Nikon Z 24mm f/1.8 S, Sony FE 24-240mm f/3.5-6.3 OSS, Sony FE 70-300mm f/4.5-5.6 G OSS, Sigma 18-35mm F1.8 Art, Sigma 18-300mm F3.5-6.3 Contemporary DC Macro OS HSM, Tamron 18-400mm f/3.5-6.3 Di II VC HLD Lense
  • NOTE: These Altura Photo filters are compatible with all 72mm lenses. Please verify your camera's lens thread size before ordering. Your camera's lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. This number is always preceded by a ''Ø''(diameter) symbol. For example: Ø72 = 72mm lens thread size.
Bestseller No. 8
Fotga 58mm Slim Fader Variable Adjustable ND2 to ND4 ND8 ND16 ND32 ND400 ND Neutral Density Filter for Sony Canon Nikon AF-S Nikkor 50mm f/1.8G Pentax Panasonic Olympus Fujifilm DSLR Camera Lens
  • Neutral Density (ND) filters can reduce the intensity of light without appreciably changing its color. Traditionally speaking, ND filters have different f-stop reduction numbers and transmittance thus generated can be applied for different shooting conditions, such as portraiture, water falls, etc. Slim profile design. Thin filters are essential for avoiding vignetting when shooting at wider angles. Simply rotate the ring of this filter, it offers 2 to 8 stops added density.
  • Apply slow shutter speed under strong sunlight exposure. Large aperture is available to create depth of field easily. Carry ONLY a single filter with the same capability with ND2, ND4, ND8 and ND400. The Fader ND filter is suggested to use with wide and standard lens to obtain the best performance. Image quality may drop when focal length above 200mm. It may not be suitable for wide angle lens <24mm,35mm film format equivalent.
  • Specification: Material: Optical Glass from Japan Back thread diameter (attach to lens): 58mm Front thread diameter (attach additional filter): 62mm Included: 1 x 58mm Fader ND Filter (ND2- ND400) With Original Box
Bestseller No. 9
ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF Nikkor 50mm f/1.8D Lens
  • ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF Nikkor 50mm f/1.8D Lens
Bestseller No. 10
CPL Circular Polarizer Glare Shine Polarizing Filter for Nikon AF-S NIKKOR 50mm f/1.4G f/1.8G Lens
  • CPL Circular Polarizer Glare Shine Polarizing Filter for Nikon AF-S NIKKOR 50mm f/1.4G f/1.8G Lens
Bestseller No. 11
Haoge 52mm Ultra Slim MC UV Protection Multicoated Ultraviolet Lens Filter for Nikon Nikkor AF 50mm F1.4D, 50MM F1.8D, 35mm F2D, 28mm f2.8D, 35mm F1.8G, 40mm F2.8G
  • Haoge 52mm Ultra Slim MC UV Filter is a general use, clear filter designed to absorb ultraviolet light and reduce the bluish cast of daylight to give clearer pictures with less haze.
  • To prevent internal ghosting and reflections while providing over 99.8% light transmission, glass surface includes Multi-layers of anti-reflection coating.
  • Protects lens from dust, dirt, and scratches.
  • 52mm diameter
  • Thickness: 3.1mm
Bestseller No. 12
JJC 46mm ND Filter ND2-2000 VND Variable Neutral Density Fader for Nikon Z50 II Z50 Z30 Z fc Zfc w/Z DX 16-50mm Kit Lens for Panasonic G7 w/Lumix G 14-42mm Kit Lens & Other 46mm Filter Thread Lenses
  • Darkens entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required, suitable to record movement/image blur in subjects such as waterfalls, streams, waves, clouds or any fast moving subject
  • Eliminates buying many fixed ND Filters as it is designed with a built-in rotating ring that controls neutral density ranging from ND2 to ND2000 (1 to 11 f-stop). The heavier the density, the slower your shutter speed will be
  • When using this variable ND filter at high ND values (9 f-stop or above) on wide angle lenses, it would appear "X" cross mark, vignetting, reflections or blur in the picture, this is unavoidable according to the structure and operating principle of a variable ND filter. If this is not acceptable to you, please go for a non variable ND filter, for example, a popular fixed ND1000 10 f-stop ND filter
  • The filter is constructed from German famous brand optical glass that features 9 layers of anti-reflection coatings on each side(total 18 layers), making the filter anti-scratch, anti-static, oil and water-resistant
  • Compatible with any lens with 46mm diameter filter thread - This variable ND filter is double threaded, has 46mm inner thread(male) and 49mm outer thread(female), this design allows you to put on any 49mm thread accessories such as lens cap, screw-in type lens hood to the front of the filter
Bestseller No. 13
ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Canon EF 50mm f/1.8 STM Lens
  • ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Canon EF 50mm f/1.8 STM Lens
Bestseller No. 14
ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon NIKKOR 50mm f/1.2 Lens
  • ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon NIKKOR 50mm f/1.2 Lens
Bestseller No. 15
Fotga 58mm Slim Optical Glass Camera Lens Filter Kits (Variable ND2-ND400 ND + MC UV + MC CPL Filter) + Filter Pouch,Fits for Nikon AF-S FX NIKKOR 50mm f/1.8G f/1.4G
  • Fotga 58mm Camera Lens Filter Kits ( Variable ND2-ND400 ND Filter + MC UV Filter + MC CPL Filter)+ Filter Pouch
  • Suitable for Camera lens with 58mm front thread
  • Material: Aluminum & Glass
  • Variable ND filter can be adjustable from ND2 to ND400.Multi-coated circular Polarizer and Ultraviolet filter with high light-transmission.
  • Package includes: 1 x Fotga Slim Variable ND filter,1 x Fotga Slim MC UV,1 x Fotga Slim CPL,1 x Filter Pouch
Bestseller No. 16
ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon NIKKOR 50mm f/1.4 Lens
  • ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon NIKKOR 50mm f/1.4 Lens
Bestseller No. 17
JJC 55mm ND Filter ND1000 Fixed 10-Stop Neutral Density Fader for Nikon D3500 D3400 D5600 D7500 with AF-P 18-55mm Kit Lens for Sony A7 A7II A7III A7IV with FE 28-70mm Kit Lens & Other 55mm Lenses
  • 1000x filter factor, providing a 10-stop exposure reduction which allows you to control depth of field and convey movement more easily
  • Darkens entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required, suitable to record movement/image blur in subjects such as waterfalls, streams, waves, clouds or any fast moving subject
  • It does not affect coloration of the image and is ideal for pairing with other filters, unlike a variable ND filter which could cause "X" cross mark, vignetting, reflections or blur in the picture when using wide angle lenses at higher ND values, this ND1000 fixed 10-stop neutral density 3.0 filter does not have this kind of issue.
  • The filter is constructed from Japanese famous brand optical glass that features 8 layers of anti-reflection coatings on each side(total 16 layers), making the filter anti-scratch, anti-static, oil and water-resistant
  • Compatible with any lens with 55mm diameter filter thread - This ND1000 filter is double threaded, has 55mm inner thread(male) and 55mm outer thread(female), this design allows you to put on any 55mm thread accessories such as lens cap, screw-in type lens hood to the front of the filter
Bestseller No. 18
ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF-S NIKKOR 50mm f/1.4G Lens
  • ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF-S NIKKOR 50mm f/1.4G Lens
Bestseller No. 19
K&F Concept 49mm ND1000 (10-Stop Fixed Neutral Density Filter) ND Lens Filter, 28 Multi-Layer Coatings Waterproof Scratch Resistant Super Slim for Camera Lens (Nano-X Series)
  • This filter 10 stop fixed neutral density filter exposure correction, not variable.
  • 【ND Filter Function】Reduce the amount of light by 10 stops, long-time exposure tool helps to achieve slow shutter speeds to be used on record objects movement such as waterfalls, presenting a silky smooth effect of flowing water.
  • 【Premium Material 】This ND1000 lens filter made by import Japanese AGC optical glass, 0.2% reflectivity, no color cast; Aviation aluminum alloy frame, super slim and lightweight, avoiding vignetting on the wide-angle lens. Extra tough frame ensuring durability and jamming prevention.
  • 【Nanometer Coatings】Hydrophobic, scratch-resistant, anti-reflective green coating, effectively prevents oil, fingerprint, scratch, protects the valued camera lens.
  • 【28 Multi-Layer Coatings】Multi-Layer coated process suppresses ghosting, flare, and reflections, and increases light transmission; effectively reducing the light reflection of the surface, and improving image quality.
Bestseller No. 20
ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF Nikkor 50mm f/1.4D Lens
  • ND8 ND Neutral Density Motion Blur Shutter Speed Filter for Nikon AF Nikkor 50mm f/1.4D Lens

How We Test Nd Filter Nikkor 50Mm?

We test nd filter nikkor 50mm by using it for a scene. Then we review the footage to see how it looks and feels. We also consider how easy or difficult it is to use nd filter nikkor 50mm. We want to make sure that the gear we recommend is high quality and will help you make great films. So far, we’ve tested cameras, lenses, tripods, stabilizers, gimbals, audio equipment, etc. We’re always testing new gear and updating our reviews to help you find the best nd filter nikkor 50mm for your needs.

The Role Of Technology Gear In Filmmaking

There is no definitive answer to this question. Technology has both advantages and disadvantages when it comes to filmmaking. On the one hand, technological advances have made it possible to create increasingly complex and stunning visual effects. On the other hand, technology can also be a hindrance to filmmakers, as it can be difficult to control and often expensive. Ultimately, it is up to the individual filmmaker to decide how to use technology in their work. Some directors embrace new technologies wholeheartedly, while others prefer to keep things more old-fashioned. There is no right or wrong answer – it all comes down to personal preference.

Some of the advantages of using technology in filmmaking include:

  • Increased control over the final product: Technology allows filmmakers more control over their work, as they can now create exactly the effect they are looking for.
  • Greater flexibility: Technology also gives filmmakers greater flexibility in shooting and editing their films. They can now experiment with different techniques and methods without worrying about the cost or the time involved.
  • Improved quality: Technology has also led to an improvement in the overall quality of films. With more sophisticated equipment and software, filmmakers can now create better-looking and sounding films.
  • Increased audience engagement: Technology can also help to engage audiences more with films. For example, interactive features such as virtual reality can immerse viewers in the film world and make them feel more connected to the characters and story.

Some of the disadvantages of using technology in filmmaking include:

  • Cost: One of the biggest disadvantages of using technology in filmmaking is the cost. New equipment and software can be very expensive and often need to be updated regularly.
  • Time-consuming: Technology can also be time-consuming, as filmmakers often need to spend hours learning how to use new software or equipment.
  • Difficult to control: Another downside of technology is that it can be difficult to control. This is especially true of complex visual effects, which can often go wrong if they are not managed correctly.
  • Can be disruptive: Technology can also be disruptive on set, as it can sometimes be difficult to keep track of all the elements that need to be managed.

There are a number of benefits to using nd filter nikkor 50mm, whether it is for amateur or professional use. nd filter nikkor 50mm will bring you some of the top benefits. Of course, it is important to remember that you don’t need the most expensive gear to produce good results – it is more important to know how to use what you have to its fullest potential. Nevertheless, if you can afford it, investing in some quality gear will definitely pay off in the long run.

About Camera Accessories- Things Should You Know Before Purchase Nd Filter Nikkor 50Mm

One of the essential pieces of equipment for any filmmaker is a camera. However, there are a number of different accessories that can be used to improve the quality and results of your films. Below are some of the most common accessories used in filmmaking.

Tripods: A tripod is a three-legged stand that is used to support a camera. Tripods are important because they allow you to keep the camera steady, which is essential for getting clear and sharp images.

Monopods: A monopod is a single-legged stand that can be used to support a camera. Monopods are often used when a tripod is not practical, such as when you are shooting in a crowded area or need to move around quickly.

Sliders: Sliders are used to create smooth camera movements. They are placed on a tripod, and the camera is attached to the slider so that it can move smoothly back and forth.

Dolly: A dolly is a platform on wheels that is used to move the camera around. Dollies can create smooth, sweeping camera movements or follow a subject as they move.

Filters: Filters can be used to change the color, brightness, or contrast of an image. They can also be used to reduce glare or reflections.

These are just a few of the many accessories that can be used to improve your filmmaking. By using these accessories, you can take your films to the next level and create professional-looking results.

What Are The Criteria For The Selection Of A Nd Filter Nikkor 50Mm?

There are a number of factors that we consider when selecting a nd filter nikkor 50mm. One of the most important criteria is how well the product performs in tests, while others are selected based on how they perform in real-world scenarios. We also look at the price of the product, as well as its availability. Another important factor is whether the nd filter nikkor 50mm is environmentally friendly. We select products that meet our high standards for quality and performance.

Testing is important to ensure that products work as intended. In order to test these products, we use a variety of methods. One method is to test the product in a simulated environment. For example, we might test a product’s ability to withstand high temperatures by using it in a sauna. We might also test its ability to resist water damage by taking it out in the rain, etc.

How To Choose The Best Nd Filter Nikkor 50Mm?

When choosing the best nd filter nikkor 50mm, it is important to look at a variety of factors. The most important criteria are how well the product performs in tests and how environmentally friendly it is. Other important factors include the price and availability of the product. Other important factors include the price and availability of the product. You should also consider whether the product is durable and easy to use. When looking at all of these factors, you can make the best decision for your needs.

  • Consider feature and performance of nd filter nikkor 50mm
  • Consider about price, especially if it’s a luxury item
  • Consider whether it’s readily available or needs to be special ordered
  • Check out the nd filter nikkor 50mm reviews
  • Is a nd filter nikkor 50mm necessary?
  • What can you use instead of a nd filter nikkor 50mm?
  • Is the nd filter nikkor 50mm environmentally friendly?
  • Brand Repute
  • Personal Preferences
  • Resale

The best nd filter nikkor 50mm for you is the one that meets your needs and fits your budget. Consider all the factors before making a decision to ensure you are getting the best product for your needs.

It’s a great idea to consider other people when buying something because it can save you money and help you avoid wasting your hard-earned cash on an item that doesn’t work. Before making any purchases, always ask yourself these questions: “What will this decision cost me?” or “How much time does this purchase need from my life”? You should also consult those close by – friends who have similar tastes as yours may provide insight into whether they would want something too.

Should You Buy Nd Filter Nikkor 50Mm Online Or in A Physical Store? 

There are a number of reasons you should buy nd filter nikkor 50mm on the e-commerce market. Some of the benefits include: 

-A wide selection of nd filter nikkor 50mm to choose from

-Easy returns and refunds

-Fast, free shipping on many items

-Access to Prime memberships

 -Save your time

It offers a wide selection of nd filter nikkor 50mm, which means you can find what you’re looking for. The return process is easy, and you can get a refund if you’re unsatisfied with a product. Shipping is fast and free on many items, and you can also access Prime memberships. All of these factors make the e-commerce market a great place to shop.

When buying a product at a physical store, you can often get help from a salesperson if you have questions or need assistance. You can also see the product in person before making a purchase.

7 Tips For Buying Nd Filter Nikkor 50Mm Online Safely

The holidays are just around the corner, and with them come traditional headaches on how to buy the best nd filter nikkor 50mm. Shops filled with endless queues or a lack of time can make it difficult to find affordable ones that will be useful enough! Luckily there’s an easier way – shopping online, where you get access 24/7 without having to go out. 

Do Your Research

Before you make a purchase online, be sure to do your research and read reviews to learn about the product and the seller. Only buy from reputable websites that you trust.

Use a Credit Card

When making a purchase online, use a credit card instead of a debit card. This way, you can dispute any unauthorized charges made to your card.

Beware of Fake Websites

When you are on a website you are about to purchase from, be sure to look at the URL. If it starts with https://, this means the site is secure, and your information will be encrypted.

Check the Seller’s Rating and Reviews

Before buying nd filter nikkor 50mm, be sure to check the seller’s rating and read reviews to learn about their products and service. Only buy from sellers with high ratings and positive reviews.

Make Sure the Site Uses Encryption Technology 

When purchasing online, only buy from websites that use encryption technology. This will ensure that your information is safe and secure.

Read the Terms and Conditions Before You Buy

Before making a purchase, be sure to read the terms and conditions of the website. This will help you understand the seller’s return policy and any other policies that may apply to your purchase.

Keep your Computer Protected with Anti-virus Software

Make sure to keep your computer protected with anti-virus software to help prevent any malware or viruses from infecting your system.

The convenience here is amazing because now anyone who needs something quick anytime, anywhere has easy accessibility while still being able to compare prices from different websites. You can get the best nd filter nikkor 50mm much simpler than ever before!

Bottom Line about Nd Filter Nikkor 50Mm

When you purchase nd filter nikkor 50mm, it’s important to consider whether or not the item will actually serve its purpose. Sometimes we may think that an acquisition is necessary when really there are other options available at a lower cost, which would suffice just as well with no loss in value–reviewing these alternatives beforehand can help avoid wasting money on unnecessary purchases later down the line. 

You won’t want to miss out on this! Visit us now and find the perfect product for your needs.

Leave a Comment