Neutral Density Absorption Type Filters at 450-650 nm

Eksma Optics neutral density (ND) filters attenuate VIS spectral region. The optical density varies from 0.1 to 3.0, 1 or 2 inches size square and roud shapes are available. Neutral density absorption type filters… Read more →

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Volume discount

5–9 units −5%
10+ units −10%

Applied in your cart. Quantities of any variant of this product count together.

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Optics › Filters › Neutral Density Absorption Filters

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Size Any

Optical Density Any

Catalog band: 0.05–6.0

Manufacturable: 0.05–6.0

0.05 6.0

Internal Transmittance Any

Material neutral density color glass

68 catalog variants — refine the spec to narrow it down.

SKU	Optical Density · Internal Transmittance · Size · Group · Material
240-2500	0.05·89% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $29
240-2501	0.1·80% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	9 in stock Ships in: 2–5 calendar days $29
240-2502	0.2·63% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $29
240-2503	0.3·50% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	83 in stock Ships in: 2–5 calendar days $29
240-2504	0.4·40% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	4 in stock Ships in: 2–5 calendar days $29
240-2505	0.5·32% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	68 in stock Ships in: 2–5 calendar days $29
240-2506	0.6·25% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	32 in stock Ships in: 2–5 calendar days $29
240-2507	0.7·20% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	7 in stock Ships in: 2–5 calendar days $29
240-2508	0.8·15% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	7 in stock Ships in: 2–5 calendar days $29
240-2509	0.9·12.5% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $29
240-2510	1·10% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	5 in stock Ships in: 2–5 calendar days $29
240-2515	1.5·3% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	16 in stock Ships in: 2–5 calendar days $29
240-2520	2·1% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	12 in stock Ships in: 2–5 calendar days $30
240-2530	3·0.1% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	15 in stock Ships in: 2–5 calendar days $33
240-2540	4·0.01% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $35
240-2550	5·0.001% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $39
240-2560	6·0.0001% @ 546 nm·ø25.4 mm·Round, ø25.4 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $42
240-2600	0.05·89% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $30
240-2601	0.1·80% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $30
240-2602	0.2·63% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $30
240-2603	0.3·50% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $30
240-2604	0.4·40% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	8 in stock Ships in: 2–5 calendar days $30
240-2605	0.5·32% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $30
240-2606	0.6·25% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	8 in stock Ships in: 2–5 calendar days $30
240-2607	0.7·20% @ 546 nm·25.4 x 25.4 mm·neutral density color glass	Out of stock —
240-2608	0.8·15% @ 546 nm·25.4 x 25.4 mm·neutral density color glass	Out of stock —
240-2609	0.9·12.5% @ 546 nm·25.4 x 25.4 mm·neutral density color glass	Out of stock —
240-2610	1·10% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	14 in stock Ships in: 2–5 calendar days $30
240-2615	1.5·12.5% @ 546 nm·25.4 x 25.4 mm·neutral density color glass	Out of stock —
240-2620	2·1% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	5 in stock Ships in: 2–5 calendar days $33
240-2630	3·0.1% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $34
240-2640	4·0.01% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	4 in stock Ships in: 2–5 calendar days $36
240-2650	5·0.001% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	18 in stock Ships in: 2–5 calendar days $40
240-2660	6·0.0001% @ 546 nm·25.4 x 25.4 mm·Rectangular, 25.4 x 25.4 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $43
240-5000	0.05·89% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $78
240-5001	0.1·80% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	9 in stock Ships in: 2–5 calendar days $78
240-5002	0.2·63% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $78
240-5003	0.3·50% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	9 in stock Ships in: 2–5 calendar days $78
240-5004	0.4·40% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $78
240-5005	0.5·32% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $78
240-5006	0.6·25% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $78
240-5007	0.7·20% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $78
240-5008	0.8·15% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $78
240-5009	0.9·12.5% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	4 in stock Ships in: 2–5 calendar days $78
240-5010	1·10% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	6 in stock Ships in: 2–5 calendar days $78
240-5015	1.5·3% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $78
240-5020	2·1% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $79
240-5030	3·0.1% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $81
240-5040	4·0.01% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $84
240-5050	5·0.001% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $88
240-5060	6·0.0001% @ 546 nm·ø50.8 mm·Round, ø50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $93
240-5600	0.05·89% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	8 in stock Ships in: 2–5 calendar days $77
240-5601	0.1·80% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	3 in stock Ships in: 2–5 calendar days $77
240-5602	0.2·63% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	7 in stock Ships in: 2–5 calendar days $77
240-5603	0.3·50% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	4 in stock Ships in: 2–5 calendar days $77
240-5604	0.4·40% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	5 in stock Ships in: 2–5 calendar days $77
240-5605	0.5·32% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $77
240-5606	0.6·25% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	8 in stock Ships in: 2–5 calendar days $77
240-5607	0.7·20% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	6 in stock Ships in: 2–5 calendar days $77
240-5608	0.8·15% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	7 in stock Ships in: 2–5 calendar days $77
240-5609	0.9·12.5% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	7 in stock Ships in: 2–5 calendar days $77
240-5610	1·10% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $77
240-5615	1.5·3% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	6 in stock Ships in: 2–5 calendar days $77
240-5620	2·1% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	4 in stock Ships in: 2–5 calendar days $78
240-5630	3·0.1% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	3 in stock Ships in: 2–5 calendar days $79
240-5640	4·0.01% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	Out of stock Ships in: 62–65 calendar days $82
240-5650	5·0.001% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	2 in stock Ships in: 2–5 calendar days $87
240-5660	6·0.0001% @ 546 nm·50.8 x 50.8 mm·Rectangular, 50.8 x 50.8 mm·neutral density color glass	1 in stock Ships in: 2–5 calendar days $92

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No catalog variant matches your exact spec. Add it to your cart as a quote request — sales will confirm price and lead time within 1 business day.

Specifications

Material	neutral density color glass
Surface quality	60-40 scratch & dig (MIL-PRF-13830B)
Surface flatness	1 λ per inch @ 633 nm
Parallelism	3 arcmin
Diameter tolerance	+0.0 / -0.2 mm
Clear aperture	90% of diameter
Design wavelength	450-650 nm
Optical density tolerance	+ / - 5% of density

Description

Eksma Optics neutral density (ND) filters attenuate VIS spectral region. The optical density varies from 0.1 to 3.0, 1 or 2 inches size square and roud shapes are available.

Neutral density absorption type filters decrease the intensity of light without altering the relative spectral distribution of the energy. They are used to filter the entire visible spectrum evenly, allowing light reduction, without influencing color or contrast. Attenuation is accomplished by using a light-absorbing glass.