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Minus Violet Filters

Minus Violet and Infrared Blocking Filters are used primarily to "bracket" the color-corrected band of refracting telescopes. The Minus Violet and Infrared Blocking Filters can also be used as "visible" filters in RGBV (red-green-blue-visible) astrophotography with reflecting telescopes. The larger Minus Violet filters are for telephoto lenses.

Most digital/CCD cameras have built-in infrared filters, in which case either the Minus Violet or Infrared filter may be used. The choice would depend on how far into the blue your primary lens is color-corrected. The Minus Violet filter blocks wavelengths shorter than about 420nm; the Infrared filter blocks wavelengths shorter than about 400nm. If your camera does not have a built-in infrared filter, the Infrared Blocking Filter is recommended, which blocks all wavelengths longer than 750nm.

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Lumicon 1.25 Minus Violet Filter
The Lumicon Minus Violet Filter greatly improves photographs taken through lenses of any type. This filter is made from optically flat specially-made colored glass, and has anti-reflection coatings on both surfaces. It is especially recommended for all telephoto lenses, and will help you obtain pinpoint star images. 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 and thus eliminates 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, due to chromatic aberration. The Minus Violet filter slightly reduces light pollution.

Our price: $89.95 (€78.26)
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Lumicon 2 Inch Minus Violet Filter
The Lumicon Minus Violet Filter greatly improves photographs taken through lenses of any type. This filter is made from optically flat specially-made colored glass, and has anti-reflection coatings on both surfaces. It is especially recommended for all telephoto lenses, and will help you obtain pinpoint star images. 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 and thus eliminates 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, due to chromatic aberration. The Minus Violet filter slightly reduces light pollution.

Our price: $119.95 (€104.36)
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Lumicon 58mm Minus Violet Filter
The Lumicon Minus Violet Filter greatly improves photographs taken through lenses of any type. This filter is made from optically flat specially-made colored glass, and has anti-reflection coatings on both surfaces. It is especially recommended for all telephoto lenses, and will help you obtain pinpoint star images. 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 and thus eliminates 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, due to chromatic aberration. The Minus Violet filter slightly reduces light pollution.

Our price: $89.95 (€78.26)
Market price: $126.00 , save 29%
Quantity
Lumicon 72mm Minus Violet Filter
The Lumicon Minus Violet Filter greatly improves photographs taken through lenses of any type. This filter is made from optically flat specially-made colored glass, and has anti-reflection coatings on both surfaces. It is especially recommended for all telephoto lenses, and will help you obtain pinpoint star images. 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 and thus eliminates 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, due to chromatic aberration. The Minus Violet filter slightly reduces light pollution.

Our price: $99.95 (€86.96)
Market price: $140.00 , save 29%
Quantity