Baader Filters OIII CMOS Ultra-Narrowband 65x65mm
Original price was: $343.00.$97.99Current price is: $97.99.
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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.
| Central wavelength(nm) | 500,7 |
|---|---|
| Half-value width(nm) | 4 |
| Frame | Frames |
| Mount material | Aluminium |
| Coating of optical system | Reflex-Blocker™ |
| Appropriate for... | f/10 – f/3.5 |
| filter thickness(mm) | 2 |
| Filter Size(mm) | 65 x 65 |
| 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 | Ultra-Narrowband Ultra-Narrowband Emission line filter with a very narrow full width at half maximumClick to read more… |
| Useful for photographs | yes |
| Visually useful | no |
| Twin stars | no |
| Moon & Planets | no |
| Nebulae & galaxies | yes |
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