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Urth 55mm ND2-400 Variable ND Filter

Urth 55mm ND2-400 Variable ND Filter

Urth Variable ND2-400 Filters provide 1 to 8.66 f-stops of light reduction, giving you greater cre...

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Wex Photo VideoUrth Variable ND Lens Filter - 40.5mm - ND2-400 (1-8.6 Stop)
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Product Information

Full details

The Urth 55mm ND2-400 Variable ND Filter is for photographers and filmmakers seeking to gain creative control over exposure in variable lighting conditions. Its key benefit is offering a wide range of light reduction, from 1 to 8.66 f-stops, allowing for greater flexibility with aperture and shutter speed. A potential caveat is the possibility of slight color shifts or 'X' patterns at extreme settings, which can be managed with careful use.

All features

BrandUrth

Extended Product Information

FAQs

What does ND2-400 mean?

ND2-400 indicates the range of neutral density the filter can provide. ND2 reduces light by 1 f-stop, and ND400 reduces light by approximately 8.66 f-stops. The 'variable' aspect means you can adjust the density anywhere within this range.

Can I use this for video?

Yes, this filter is excellent for video. It helps maintain the 180-degree shutter rule (e.g., 1/50 sec for 24fps) in bright conditions and allows control over depth of field by enabling wider apertures.

Will this filter affect image sharpness?

High-quality variable ND filters, like this Urth model, are designed to minimize sharpness reduction. However, at extreme ND settings, some minor impact on sharpness or introduction of artifacts like an 'X' pattern can occur.

How do I know if 55mm is the right size for my lens?

Look for a diameter symbol (e.g., Ø) followed by a number on your lens barrel, usually near the front. If it reads '55', then 55mm is the correct size. If not, you'll need a different size filter or a step ring.

Is this filter good for long exposures?

Yes, the higher end of the ND range (up to ND400) is specifically designed to allow for much longer shutter speeds in bright daylight, essential for capturing motion blur in water or clouds.

How do I avoid the 'X' pattern?

The 'X' pattern, or cross-polarization, often appears at the maximum density settings. To avoid it, try to slightly decrease the ND level by rotating the outer ring. Ensure the two polarizing elements within the filter are properly aligned.

Troubleshooting

Visible 'X' pattern or cross-polarization effect

This typically occurs at the highest ND settings. Rotate the filter ring to a slightly lower ND value to resolve the issue. Ensure the filter is properly seated on the lens.

Slight color cast in images

Variable ND filters can sometimes introduce a slight color shift, especially at extreme settings. Adjust white balance in post-processing or use a custom white balance setting on your camera. For critical work, consider a fixed ND filter.

Filter is difficult to screw onto the lens

Ensure you are using the correct filter size (55mm) and that the lens threads are clean. Do not force the filter; try unscrewing and reattaching it gently.

Image is still overexposed

Confirm the filter is rotated to its maximum ND setting (ND400). If more reduction is needed, you may require a stronger ND filter or a lower ISO/faster shutter speed combination.

Pros and Cons

Pros

  • Offers a broad range of ND stops in a single filter.
  • Provides significant creative flexibility for aperture and shutter speed control.
  • Ideal for both photography and videography applications.
  • Helps achieve professional-looking effects like bokeh and motion blur.
  • Reduces the need to carry multiple fixed ND filters.

Cons

  • May exhibit slight color casting at extreme ends of the variable range.
  • Potential for an 'X' pattern or vignetting at the highest ND levels.
  • Requires careful adjustment to avoid over-correction.
  • Slightly more complex to use than a fixed ND filter.
  • Requires a 55mm lens thread size; adapter rings may be needed for other lenses.

Setup, Compatibility & Care

Setup: Screw the filter onto the front of your 55mm threaded lens. The filter has two rotating rings; rotate the outer ring to adjust the ND effect. Begin at the lowest setting (ND2) and gradually increase the density until you achieve the desired exposure.

Compatibility: This filter is designed for lenses with a 55mm front filter thread. Ensure your lens has this specific thread size. For lenses with different thread sizes, use a compatible step-up or step-down ring.

Care: To clean, gently dust the filter with a soft brush. For smudges or fingerprints, use a microfiber cleaning cloth and a lens cleaning solution. Avoid abrasive materials or harsh chemicals. Store the filter in its protective case when not in use.

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