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Astrodon 31 mm unmounted Luminance Filter - UV+NIR Blocking

Name: Astrodon 31 mm unmounted Luminance Filter - UV+NIR Blocking
Brand: Astrodon Astrophoto Filter
SKU: L2-31R
Price: 318.74 EUR

The luminance channel is probably the most important for a great final image! You want as much signal as possible so the filter should have the highest transmission possible with a wide spectral bandpass.

UV/NIR-blocking filter used for both E- and I-Series LRGB sets

Transmits at least 97% between 400 and 700 nm.

395 nm cut-on (50% transmission at 395 nm); blocked above 705 nm

Significant reflection and star halo reduction

Parfocal with Astrodon Gen2 color and luminance filters as well as with Astrodon narrowband line filters

Manufacturer: Astrodon Astrophoto Filter

Product number: L2-31R

EUR 318,74

incl. 19 % VAT (DE)

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excl. 6.95 € shipping costs (DE)

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Astrodon 31 mm unmounted Luminance Filter - UV+NIR Blocking

The luminance channel is probably the most important for a great final image! You want as much signal as possible so the filter should have the highest transmission possible with a wide spectral bandpass.

UV/NIR-blocking filter used for both E- and I-Series LRGB sets

Transmits at least 97% between 400 and 700 nm.

395 nm cut-on (50% transmission at 395 nm); blocked above 705 nm

Significant reflection and star halo reduction

Parfocal with Astrodon Gen2 color and luminance filters as well as with Astrodon narrowband line filters

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Technical data..
In the box..

Astrodon unmounted 31 mm Luminance Filter - UV+NIR blocking

A durable, hard-coated UV and IR blocking filter of the highest quality having the best transmission available.

The luminance channel is probably the most important for a great final image! You want as much signal as possible so the filter should have the highest transmission possible with a wide spectral bandpass.

Astrodon luminance filter specifications

3.000+/-0.025 mm substrate thickness

Parfocal with Astrodon Gen2 color and luminance filters as well as with Astrodon narrowband line filters

Single, striae-free fused silica substrate

1/4 wave substrate prior to coating

< 0.5 arcminute parallelism before coating

Hard coated to edge

Significant reflection and star halo reduction

Guaranteed to >= 97% transmission from 400 to 700 nm

Filter size:	31 mm round filter, unmounted
Thickness:	3 mm +/-0.025 mm
Parfocal to:	Astrodon Gen2 color and luminance filters, Astrodon narrowband line filters
Transmitting range:	395 nm to 705 nm
Transmission from 400 nm to 700 nm:	97% or more
Coating:	Ultra-hard and durable sputtered coating
Substrate:	Fused silica
Parallelism:	30 arcsec