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Baader U-Filter Venus 1.25” Filter

SKU: BAA-2458292

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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 1500nm, through the use of a complex 20 layer dielectric coating stack, on top of a special optically polished UG-11 substrate. Up till 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 poor transmissions of many optics in the UV and the lower sensitivity of some CCDs to this wavelength, high filter efficiency and complete rejection at longer wavelengths becomes paramount to recording good contrast at reasonable exposures. The same high optical quality and features as the other Baader filters ensures the highest contrast and sharpest images possible.

The Baader U Filter has become the choice of UV imagers exploring the UV world of landscape, floral, and even forensic imaging. The latest 2" filter now has even higher transmission and improved out of band blocking. By using our DSLR-2 filter adapter ring plus the appropriate filter step ring (HDT-Rings), UV imagers can conveniently mount the U-Filter to their camera lens.

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