Manufacturer: Optolong
Product number: OPL-LRGBNB-2

EUR 848,00RRP EUR 1.009,00you save 16% (EUR 161,00)


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Product expected to be available from 27.04.2024

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The complete filter set for tricolor imaging
This filter kit includes all LRGB with SII 6.5 nm, OIII 6.5 nm and Ha 7 nm filter. It is suitable for planetary imaging as well as for photographing deep-sky objects.

LRGB filter set
This set divides the spectrum into its components red, green, blue and luminance.

OIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. The gap between green and red filters serves to block out the primary sodium light pollution line at 589 nm and improves color balance and separation.

Main Use and Performance
Work well with debayered monochrome cameras
Suitable for deepsky and planetary imaging
RGB-imaging allows equal weighting factors for each channel, very important for automated imaging.
The ideal raw material for image processing in the sRGB color space is available with LRGB filter set and a mono camera.


The line (extra narrowband) filters
This set transmits only the lines of gases in emission nebulae, significantly reducing stray light from cities.

Main Use and Performance
Suitable for photographing on faint emission nebulae in full moonlight or in severe light pollution
Hubble look of images can be made by the combination of H-alpha, OIII and SII, such as the famous “Pillars of Creation” (M16 Eagle Nebula)
Narrowband imaging with SHO set (H-alpha, OIII and SII) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks
OIII filter is also suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants

Substrate:High-quality optical glass from Schott
Thickness:2.0 mm
Surface Treatment:Fine-optically polished
Surface Polish Quality:60/40 (Refer to MIL-O-13830)
Surface Quality:1/4 wavefront
Coating:Muti-coated
IR cutoff at:700-1100 nm
Cell:Filter cell 2", black anodized, laser engraved
Clear Aperture:45 mm
Cell height:5 mm without external thread, 7 mm with M48 external thread
Typical transmission off-band:0.1% (OD3)
Typical transmission LRGB passband:95%
:
Centre wavelength H-alpha:656.3 nm
FWHM H-alpha:7 nm
Typical transmission H-alpha:<85%
Centre wavelength [S II]:672 nm
FWHM [S II]:6.5 nm
Typical transmission [S II]:80%
Centre wavelength [O III]:500 nm
FWHM [O III]:6.5 nm
Typical transmission [O III]:80%
7 Filters in suitable storage boxes

Which side of the filter needs to face towards the telescope?
Optolong has a good explanation on their page with a check on unmounted filters. With mounted filters, it´s easy. The side with the external thread must face the camera.

Link to iOptron page: Should Optolong filters be installed in a certain orientation? (external link)
You can download the generated PDF from our own server.


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