Lumicon Minus Violet Filter
Minus Violet Filter 72mm
Lumicon Minus Violet Filter and Infrared Blocking Filters are used predominantly to "bracket" the color-corrected band of refracting telescopes.
The Minus Violet and Infrared Blocking Filters may 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.
The majority of 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.
The LF3135, 72mm Minus Violet Filter, threads into 72mm telephoto lenses. The LF3135 may be used with other size lenses by using step-rings
Minus Violet Filter 58mm
The LF3130, 58mm Minus Violet Filter, threads into 58mm telephoto lenses. The LF3130 may be used with other size lenses by using step-rings
Minus Violet Filter 2in
The LF3125, 2" Minus Violet Filter, threads into 2" Camera Adapters, such as the Lumicon LC1025, 2" Prime Focus Camera Adapter, or the LA1080, Low Profile 2" Prime Focus Camera Adapter.
Minus Violet Filter 1.25in
The LF3120, 1.25" Minus Violet Filter, threads into the nose-piece of industry-standard 1.25" Digital Imagers
Return From Lumicon Minus Violet Filter To Lumicon Filters Main Page
Telescopes Home Page