IDAS NB1 Tri-Band Narrow H-Beta, O-III, H-Alpha 2" Nebular IDAS NB1 Filter
The IDAS NB filters from Hutech have been specially developed for astrophotography
The NB1 filter is a tri-line pass filter that can be used with color single-shot cameras (OSC) such as DSLRs, mirrorless system cameras or astronomical OSC cameras.
The NB1 filter passes the red H-alpha line, the blue-green OIII lines and the blue-green H-beta line and increases contrast. Narrow band images are obtained with a single series of exposures. The resulting images can be used to enhance the contrast of traditional RGB images or to create images in various common false color palettes.
The most important features of the IDAS NB1 nebula filter:
- Greater stray light suppression than with LPS-P2
- Let H-beta, [O III], C2 (partially) and H-alpha pass through
- Suitable for trichromatic imaging of objects with emission lines
- Therefore especially suitable for gaseous nebulae
- Using an RG610 results in a 19 nm wide H-alpha filter.
- Suitable for comets (Swan bands)
- High-quality anti-reflection coating
- Particularly scratch-resistant hard coating
- Absorption of urban diffuse light (mercury, sodium vapor lamps, ...) and night glare
- Blocks near infrared light, so there is no need for an IR cut-off filter
Exposure time extension - factor 4:
The IDAS NB1 allows you to extend the exposure time by a factor of 4, but lets 90% of the important deep sky lines (e.g., H-alpha and O-III) through.
In short, you can expose three times as long until the sky background passes through, but the object appears much stronger and more contrasted against the background than without a filter.
Difference NB1 - NB2 - NB3 Nebula filters:
All three filters are suitable for color and monochrome cameras, DSLRs and system cameras. The combination of these three filters allows extreme narrow band imaging with monochrome and color cameras.
NB1: Triple filter with H-Beta, O-III and H-Alpha transmission. In addition, the filter blocks near IR light, so no additional IR cut-off filter is needed. The NB1 is the most versatile filter. We also recommend the filter for DSLR and astromodified system cameras.
NB2: Dual band filter with O-III and H-alpha transmission. The contrast effect is very strong. The filter is very suitable for color astrocameras with built-in IR cut filter and for photography with pure reflecting telescopes without corrector, such as RC telescopes.
NB3: Dual band filter with O-III and S-II transmission. The contrast effect is very strong. This filter is ideal for photographing objects radiating in the S-II (sulfur) range. These nebulae usually still have an O-III component.
NBZ: Double band filter with very narrow passband of 5-6 nm (ultra narrow band) in O-III and H-alpha for extreme contrast.
IDAS NB1 Tri-Band Narrow H-Beta, O-III, H-Alpha 2" nebular filter
