High Point #47 Violet Filter - 1.25"
This #47 Violet Filter, 3% transmission by High Point Scientific is an invaluable aid to lunar and planetary observing. Colored filters reduce light scattering and glare while increasing contrast via selective filtration. Filters also provide increased definition, reduced irradiation, and lessen eye fatigue. The purple Filter has a Wratten number of #47 and can enhance views of the ring structure around Saturn. A violet filter will help with observations of Venus by revealing the dark shading that is present in the upper atmosphere. Views of the Moon and brighter comets will also be enhanced. Mars will also benefit from a violet filter during violet clearing or to detect high clouds and haze over polar ice caps. With a transmission of just 3%, you will need a telescope with an aperture of at least 8" - 10" in diameter to properly use this filter.
All of High Point's colored filters are made of high quality, solid plane parallel glass that has been anti-reflection coated to prevent glare and ghosting. They have a full 26mm clear aperture and are mounted in a black anodized aluminum cell that is threaded on both sides to fit most 1.25" eyepieces and stack with each other.
Please note that the effectiveness of this filter depends on several factors, including the aperture and focal length of your telescope, the magnification being used, and the seeing conditions at the time. Remember that filters lower the amount of light that reaches your eye. You'll need an aperture of at least 8 inches for dark filters such as the #47 Violet, with only 3% transmission, the #25 Red with just 14% transmission, or the #38A Blue with 17% transmission.
1.25" #47 Violet Filter
Dimensions & Specifications
Model Number: 47F1
Filter - Single or Set: Single Filter
Filter Size 31.75 mm (1.25")
Filter Type: Planetary Color
Filter Shape: Round
Mounted or Unmounted: Mounted
Wratten Number or Equivalent: #47 Violet Filter
Filter Warranty: Two Years
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Return & Exchange Policy
At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.
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