Baader Filters F/2 Highspeed SII CMOS 50.4mm
Original price was: $170.62.$95.99Current price is: $95.99.
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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.
| Central wavelength(nm) | 671,7 |
|---|---|
| Half-value width(nm) | 6,5 |
| Frame | ring |
| Mount material | Aluminium |
| Coating of optical system | Reflex-Blocker™ |
| Appropriate for... | f/3.4 – f/1.8 |
| filter thickness(mm) | 2 |
| Filter Size(mm) | 50,4 |
| Type | Filters Filters No matter whether they are for observing or for astrophotography, filters are very important accessories.Click to read more… |
| Type of build | line filter Line filter Filters that allow only light in a specific spectral line to pass through.Click to read more… |
| Series | f/2 Highspeed f/2 Highspeed Filters for photography with fast optics between f/1.8 and f/3.5.Click to read more… |
| Useful for photographs | yes |
| Visually useful | no |
| Twin stars | no |
| Moon & Planets | no |
| Nebulae & galaxies | yes |
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