HPOIII - High Performance OIII (503BP12) 2" Astronomy Filter
The HPOIII makes an excellent complimentary filter to Omega's Narrow Pass Band Nebula filter. The HPOIII's high transmission and narrow bandwidth allows maximum enhancement and detail for a large variety of both emission and reflective nebula. 2 inch diameter.
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High Performance OIII (HPOIII) Filter - 503BP12
The spectral curve and ascii data is a typical representation of this filter’s performance, but will vary due to production and design variations. Omega only guarantees this part to meet the product specifications listed. The displayed OD is calculated from a %T measurement. The blocking regions are likely higher OD than what is displayed here. To learn more about the challenges of measuring high OD values, see our paper.
|Center Wavelength (nm)||
|Center Wavelength Tolerance (nm)||
|FWHM Bandwidth (nm)||
|FWHM Bandwidth Tolerance (nm)||
≥ OD2 540-590nm
|Transmitted Wavefront Distortion||
≤ 3 waves
|Angle of Incidence||
|Minimum Surface Quality||
Assembly per MIL-C-48497A (F scratch/ F Dig)
≤ 1 arc minute