IDAS NB1 Dual Band H-a, H-b, OIII & NII Nebula Booster Filter - 2" Mounted
This item is discontinued by the manufacturer and is no longer available.
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
IDAS NB1: A dual band nebula booster filter for OSC shootings.
The NB1 is a thin-film interference filter that enables OSC cameras to shoot the H-beta, OIII, H-alpha and NII ranges of emission nebulae at a higher contrast rate.
The half value band pass width is about 32nm at the higher band, and about 20nm at the lower band, respectively.
Its transmittance range is intentionally shifted to the longer wave length side. allowing margins for "the shift tendency towards the shorter wave length side against oblique incidences" typically associated with thin-film interference filters.The NB1 can almost fully transfer the abovementioned nebular emission lines under the conditions , for example, where the incidence of the parallel flux is kept below 14 degrees, or a lens of the F value 2 or faster (or 1.4 or faster depending on lens) is used before this filter.
Specifications:
- M48 x 0.75
- Filter thickness: 2.5mm
- Lightweight frame
Other Information
- Country of Manufacture: Japan
IDAS NB1: A dual band nebula booster filter for OSC shootings.
The NB1 is a thin-film interference filter that enables OSC cameras to shoot the H-beta, OIII, H-alpha and NII ranges of emission nebulae at a higher contrast rate.
The half value band pass width is about 32nm at the higher band, and about 20nm at the lower band, respectively.
Its transmittance range is intentionally shifted to the longer wave length side. allowing margins for "the shift tendency towards the shorter wave length side against oblique incidences" typically associated with thin-film interference filters.The NB1 can almost fully transfer the abovementioned nebular emission lines under the conditions , for example, where the incidence of the parallel flux is kept below 14 degrees, or a lens of the F value 2 or faster (or 1.4 or faster depending on lens) is used before this filter.
Specifications:
- M48 x 0.75
- Filter thickness: 2.5mm
- Lightweight frame
IDAS NB1: A dual band nebula booster filter for OSC shootings.
The NB1 is a thin-film interference filter that enables OSC cameras to shoot the H-beta, OIII, H-alpha and NII ranges of emission nebulae at a higher contrast rate.
The half value band pass width is about 32nm at the higher band, and about 20nm at the lower band, respectively.
Its transmittance range is intentionally shifted to the longer wave length side. allowing margins for "the shift tendency towards the shorter wave length side against oblique incidences" typically associated with thin-film interference filters.The NB1 can almost fully transfer the abovementioned nebular emission lines under the conditions , for example, where the incidence of the parallel flux is kept below 14 degrees, or a lens of the F value 2 or faster (or 1.4 or faster depending on lens) is used before this filter.
Specifications:
- M48 x 0.75
- Filter thickness: 2.5mm
- Lightweight frame
Other Information
- Country of Manufacture: Japan