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OIII Filter: The narrowband O-III 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, blocking out all other light.
IDAS OIII 6.0nm narrowband filter
- 6.0 +/- 0.2nm bandpass (measured value)
- 98% transmission (measured value)
- 2.5mm & 3.0mm thickness
- Optimized from F1.65 to any
- Fully blocks up to 1300nm as illustrated in the plot
- Each filter is individually inspected and measured for quality
- Comes with the actual measured plot with the unique product code
- Made in Japan
