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Variable Neutral Density Filter Mount for Round Neutral Density Filters NDFR-PM

NDFR-PM
$74.57
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Variable Neutral Density Filter Mount for Round Neutral Density Filters — Model NDFR-PM

Variable Neutral Density Filter Mount for Round Neutral Density Filters

Product Description

  • OD value can be adjusted by rotating the filter angle
  • Circular shape, OD value continuously adjustable
  • Anti-reflection coating: 350 nm-700 nm

LBTEK continuous neutral density filters are constructed from UV-grade fused silica substrates, with a chromium-nickel-iron alloy coating applied to one side over a 0~270° angular region. Within the coated area, the optical density (OD) varies linearly with the rotation angle (θ), following the relationship OD = k * θ. By rotating the coated region of the filter, linear and adjustable attenuation of the light beam can be achieved. Additionally, the back surface of the filter is coated with an anti-reflection (AR) coating, which effectively suppresses stray light within the 350-700 nm operating wavelength range. Currently, the available OD ranges for continuous neutral density filters include 0.02-2.0, 0.02-4.0, and 0.02-6.0, with optional diameters of Ø25 mm, Ø50 mm, and Ø100 mm. In addition to standard products, LBTEK offers various customization services. For custom orders, please contact LBTEK technical support.

Variable Neutral Density Filter Mount for Round Neutral Density Filters

  • M6 threaded hole on the main body, with M4 threaded hole adapter included
  • Compatible with NDFR series filters with center hole diameter Ø7.5 mm
  • Suitable for optical elements with a thickness of 2 mm

The LBTEK Neutral Density Filter Mount allows the installation of NDFR series filters with a central hole diameter of Ø7.5 mm onto the rotating shaft. To install the filter, first use the included 1.5 mm hex wrench to tighten the fixing screw on the side of the NDFR-PM to lock the rotation. Then, use the included 2 mm hex wrench to remove the silver hex socket screw. Place the filter between the two washers, then reassemble the rotating wheel and screw combination. Please note to maintain the original sequence of flat washers and wave springs when reassembling, and securely fasten the bolt. The package includes one each of 1.5 mm and 2.0 mm hex wrenches.

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Product Family: Continuous neutral density filter, operating wavelength: 350 nm-700 nm (19 variants)

Product ▴▾ SKU Size ▴▾ Clear Aperture ▴▾ Operating Wavelength ▴▾
Variable Neutral Density Filter Mount for Round Neutral Density Filters NDFR-PM Current NDFR-PM — — —
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-100C-6-A NDFR-100C-6-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-100C-4-A NDFR-100C-4-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-100C-2-A NDFR-100C-2-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-50C-6-A NDFR-50C-6-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-50C-4-A NDFR-50C-4-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-50C-2-A NDFR-50C-2-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-25C-6-A NDFR-25C-6-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-25C-4-A NDFR-25C-4-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-25C-2-A NDFR-25C-2-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-100C-6M-A NDFR-100C-6M-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-100C-4M-A NDFR-100C-4M-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-100C-2M-A NDFR-100C-2M-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-50C-6M-A NDFR-50C-6M-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-50C-4M-A NDFR-50C-4M-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-50C-2M-A NDFR-50C-2M-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-25C-6M-A NDFR-25C-6M-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-25C-4M-A NDFR-25C-4M-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-25C-2M-A NDFR-25C-2M-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View