Observatoire astronomique amateur, astronomie, astronomique, astrophotographie, observations, ciel nocturne, photographie du ciel, nuit |
Lumicon International
Minus Violet Filters
Lumicon Minus Violet Filter for color or B&W photography The Lumicon Minus Violet Filter greatly improves photographs taken through lens systems, producing pinpoint star images. It is especially recommended for all telephoto lenses. This filter is made from optically flat, specially-made colored glass, and has anti-reflection coatings on both surfaces. The Minus Violet filter passes the maximum amount of visible light, including the full blue, green, yellow, and red portions of the spectrum. It absorbs violet and ultraviolet light below 420nm, thus eliminating blue halos around bright stars in color photography. In B&W photography it eliminates bloated and swollen star images caused by violet and ultraviolet light which telephoto lenses cannot focus perfectly, due to chromatic aberration. The Minus Violet filter slightly reduces light pollution. Recommended
Films Filter
Factor For
Viewing Lumicon Minus Violet Filter - 48mm LF-MV05 Lumicon Minus Violet Filter - 58mm LF-MV10 Lumicon Minus Violet Filter - 72mm LF-MV15
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