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Urth Variable ND Lens Filter (46mm, 1 to 8.6-Stop)

BH #URVND240046 • MFR #UNDX400ST46
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Urth Variable ND Lens Filter (46mm, 1 to 8.6-Stop)
Key Features
  • Variable 0.3 to 2.6 Optical Density
  • Offers Better Creative Control
  • Create More Cinematic Effects
This 46mm Variable ND Lens Filter can be adjusted to block 1 to 8.6-stops of light, giving you more flexibility in bright variable light. By blocking up to 8.6-stops, you can use wider apertures in bright variable light for shallower depth of field effects and slower shutter speeds for long exposure effects without overexposing your images.
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Urth UNDX400ST Overview

This 46mm Variable ND Lens Filter can be adjusted to block 1 to 8.6-stops of light, giving you more flexibility in bright variable light. By blocking up to 8.6-stops, you can use wider apertures in bright variable light for shallower depth of field effects and slower shutter speeds for long exposure effects without overexposing your images.
Cinematographers can use this Variable ND Lens Filter to create more cinematic effects in bright light. The filter comes with a protective travel tin case, a recycled cleaning cloth, and recycled plastic-free packaging.

EAN: 9354842005626

Urth UNDX400ST Specs

Filter Type
Variable ND
Exposure Reduction
1 to 8.6-Stop
Size
46 mm Rear Filter Thread
Front Accessory Thread / Bayonet
46 mm
Filter Material
Not Specified by Manufacturer
Ring Material
Aluminum
Packaging Info
Package Weight
0.185 lb
Box Dimensions (LxWxH)
3.9 x 3.8 x 0.9"

Urth UNDX400ST Reviews

Fits perfectly and great variable range

By Brittany
Rated 5 out of 5
Date: 2026-11-03

Love this ND filter, it fits perfect on the Fujifilm 23mm f/2.8 pancake lens and has great range different lighting.

a bit disappointing

By Michael
Rated 2 out of 5
Date: 2026-02-27

Had a chance to use the filter and there was some pretty heavy color cast at darkest setting. My skills can be in part to blame but was hoping for better. The example attached is a cell phone photo of a raw file I took with the filter at full darkness. I know some color cast can be fixed in post but thought the quality of this one would have bypassed the amount I got in this example in addition to some artifacts. General take away is that I'm happy to have a ND filter now but worried that there will be images that will be ruined beyond my editing skills to bring back from this amount of color cast.

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