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Filters > Nebulae filters > OIII Filters > Baader > Baader Filters Ultra-Narrowband 4.5nm OIII CCD-Filter 31mm
Product no.: 62163

Filters Ultra-Narrowband 4.5nm OIII CCD-Filter 31mm

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Product description

OIII filtersonly allow light with a wavelength of 501 nanometres through. This corresponds with the spectrum lines fordouble ionised oxygen. These lines are emitted by planetary nebulae and some emission nebulae, so these objects remain visible whilst the rest is blocked out by the filter. This effect increases contrast and makes faint nebulae visible for the first time.

Astrophotography:These filters are best used with monochrome cameras. Ideally, images taken using these filters should be combined with images using H-alpha and SII filters. This creates an image which depicts faint nebulae clearly and with high-contrast.

Specifications

Capacity


Central wavelength (nm)
502
Half-value width (nm)
4,5
Optical length (mm)
3
Coating of optical system
dielectric
Frame
unmounted
Filter Size (mm)
31

General


Type
Filters
Type of build
line filter

Area of application


Useful for photographs
yes
Planetary nebulae
yes
Baader Filters Ultra-Narrowband 4.5nm OIII CCD-Filter 31mm
Baader Filters Ultra-Narrowband 4.5nm OIII CCD-Filter 31mm

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