LPS filters are available for 1-1/4" and 2" (48mm) eyepieces, as well as in numerous sizes to accomodate most popular camera lenses. Each filter lot is tested and a plot of the spectral response of the lot is provided with each filter.

Above is a sample of the filter lot data plot which is shipped with each filter.

The IDAS production criteria for filters are as follows, arranged from left to right (short to long wavelength) as plotted above:

Wavelength (nm)		Pass/Block		Transmission
365		Block		6.5% max
405		Block		6.5% max
		Pass		60% min (avg)
436		Block		6.5% max
		Pass		92% min (avg)
546		Block		6.5% max
		Pass		75% min (avg)
590		Block		6.5% max
		Pass		75% min (avg)
623		Block		25% max
		Pass		80% min (avg)