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<title><![CDATA[EC21 Product Catalogs - optical nd filter]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/optical_nd_filter--271307/1/optical nd filter.html]]></link><item>
<title><![CDATA[Good Price Neutral Density Color Glass Filters Optical ND Filter]]></title><link><![CDATA[https://positiveoptics.en.ec21.com/Good_Price_Neutral_Density_Color--11970681_11970687.html]]></link><description><![CDATA[Neutral Density (ND) filters are designed to reduce transmission evenly across a portion of a specific spectrum. They are typically defined by their Optical Density (OD) which describes the amount of]]></description><pubDate><![CDATA[20240718]]></pubDate></item>
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<title><![CDATA[ND Filter Neutral Density Filter Camera Lens ND Filter]]></title><link><![CDATA[https://june20210728.en.ec21.com/ND_Filter_Neutral_Density_Filter--11547959_11548058.html]]></link><description><![CDATA[filters are categorized by their optical density (D) 
which is defined as the logarithm to the base 10 of the reciprocal of 
the transmittance (T): T=10-DSpecificationClear Apeture80%Surface Quality6]]></description><pubDate><![CDATA[20230922]]></pubDate></item>
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<title><![CDATA[Optical Bandpass Filter]]></title><link><![CDATA[https://daisydong147.en.ec21.com/Optical_Bandpass_Filter--10849537_10849627.html]]></link><description><![CDATA[Optics offers a variety of Optical Filters for many applications, including bandpass interference, notch, edge, dichroic, color substrate, or ND. 
Bandpass Interference Filters are designed to transm]]></description><pubDate><![CDATA[20181108]]></pubDate></item>
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<title><![CDATA[CWL 228nm  239nm 240nm 254nm 280nm 289nm 340nm Narrow Bandpass UV Filter]]></title><link><![CDATA[https://worldhawkcindy.en.ec21.com/CWL_228nm_239nm_240nm_254nm--11486363_11498365.html]]></link><description><![CDATA[filter, Cut off filters, UV bandpass filter, Narrow bandpass filter, ND filter, Negative Filter or Notch filters, dichroic, color substrate.
Optical Filters are used to selectively transmit or reject]]></description><pubDate><![CDATA[20240201]]></pubDate></item>

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