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Filters > Nebulae filters > SII Filters > Optolong > Optolong Filters SII 3nm 2"
Product no.: 73723

Filters SII 3nm 2"

$ 980.00 Sale price:
$ 880.35 incl. VAT, plus shipping costs
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Product description

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


Connection ( to eyepiece)
2"
Frame
2"
passband (nm)
672
Half-value width (nm)
3

General


Type
Filters
Type of build
line filter

Area of application


Useful for photographs
yes
Anti light-pollution
yes
Planetary nebulae
yes
Supernova remains
yes
Visually useful
-
Hydrogen nebulae
yes
Nebulae & galaxies
yes
Optolong Filters SII 3nm 2"

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