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Baader Planetarium U-Filter 2 (Venus, Ultraviolet, ZWL 350nm)
The Badder Venus Filter enables amateurs to successfully image in the deep UV, a spectral region normally inaccessible. The latest coating technologies permit the Baader Venus Filter to transmit from 300nm to 400nm, with a peak transmission of 80%! The filter completely blocks the rest of the region from 200nm to through the use of a complex 20 layer dielectric coating stack, on top of a special optically polished UG-11 substrate. Until now, amateur efforts typically relied upon deep violet colored filters, or combinations with simpler interference filters, which do not provide the high transmission and efficient rejection outside the important spectral region from 320nm to 390nm. Given the

Price is $387.00
Price: $387