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Filters > Nebulae filters > SII Filters > Baader > Narrowband > Baader Filters SII CMOS Narrowband 2"
Product no.: 70868

Filters SII CMOS Narrowband 2"

$ 248.20 incl. VAT, plus shipping costs
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Product description

More about the series Narrowband...

SII filter: The narrowband S-II 7nm filter passes light at 672nm wavelength with a bandpass of 3nm which is designed for nebula fotography.

It is suitable for most emission nebulae, planetary nebulae and supernova remnants.

f you want the look of Hubble Space Telescope (HST) images, such as the famous “Pillars of Creation” (the Eagle Nebula, Messier 16), then the next filter to consider adding to your collection after H-a and OIII is the SII (es-two) or sulfur filter. The SII filter, like H-a, is a deep red filter near 672 nm. H-a, OIII and SII filters provide that Hubble look for many emission nebula. Again, tri-color narrowband imaging with these three filters can be done with the moon up, so your equipment is not sitting dormant for several weeks.

Specifications

Capacity


Central wavelength (nm)
671,7
Half-value width (nm)
6,5
Frame
2"
Mount material
Aluminium
Coating of optical system
Reflex-Blocker™
Connection (to the telescope)
2"
Appropriate for...
f/10 - f/3.5
filter thickness (mm)
2

General


Type
Filters
Type of build
line filter
Series
Narrowband

Area of application


Useful for photographs
yes
Visually useful
no
Twin stars
no
Moon & Planets
no
Nebulae & galaxies
yes
Baader Filters SII CMOS Narrowband 2"
Light transmission curve

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