High Point #23A Light Red Filter - 1.25"
This #23A Red Filter, 25% transmission by High Point Scientific is an invaluable aid to lunar and planetary observing. This filter will reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue. The Light Red Filter has a Wratten number of #23A and can enhance definition in a comet's dust tail. When observing Jupiter and Saturn, this filter will help you study clouds with a bluish hue. With a transmission of 25%, this light red filter produces optimal daytime views of Venus and Mercury by darkening the blue sky. Mars will also benefit from a red filter in several ways. It will reduce the light from blue and green areas, which darkens the maria, oases, and canal markings while lightening desert regions that are orangish in color.
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" #23A Light Red Filter
Dimensions & Specifications
Model Number: 23AF1
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: #23A Light Red
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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