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IDAS NB1 Contrast Boost Filter |
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![]() The NB1 filter is a triple line-pass filter which can be used with one-shot color (OSC) cameras such as DSLR's or astronomical OSC cameras. Passing the red Hα+NII and the green-blue Hβ+OIII lines, the NB1 filter enhances the contrast of emission line nebulae without the time-consuming use of single-band filters.
More on other members of the NB filter family...
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