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SV231 Fringe Killer Color Correction Filter 1.25/2inch for Lunar and Planetary Surfaces

SKU: W9186
US$ 99.99
  • Correct chromatic aberration; SV231 telescope filter prevents unwanted color banding in the blue spectral range; minimizes blue wavelengths in out-of-focus areas;
  • OD>4; the higher the filter cut-off depth; the smaller the noise and the higher the imaging contrast;
  • Full thread design; M48x0.75 specification; male thread; thread is not easy to wear; you can overlay other filter to use;
  • AR anti-reflection coating design; transmittance exceeds 95%; improves the contrast and clarity of fast achromatic telescopes, ensures image quality and brightness; obtains more observable light;
  • Good performance coating; telescope color correction filter has plasma-enhanced dielectric coatings result in hard; scratch-resistant and waterproof filters;
  • 300-1200/NM wavelength; blocking light damage and eliminating blue and purple streaks.
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SV231 1.25/2 inch Color Correction Filter

The color correction filter blocks defocused light in the blue spectrum, as well as in the red part of the spectrum (IR) above 700nm, usually seen in small achromat telescopes.

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Correct Chromatic Aberration

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Block Light Pollution and Reduce Noise

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OD  Optical Density > 4

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UV and IR Cut

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AR Coating

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Plasma Coating

Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. 

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Double-sided Thread Design

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Focus Photography of Digital Camera

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Use With SV503 ED Telescope

It can be used well before the focal point of the optical system, without any loss of sharpness, as a single filter in front of a binocular for a focal projection with digital cameras.

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Use With SV48P Telescope

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Various Application Scenarios

The smaller details on craters of the Moon and planetary surfaces are so much more visible. The NIR is fully blocked up to 1150nm. Details on planets are shown much clearer when using CCD/CMOS-cameras.

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2 reviews

Write a review

great

I am stricktly a visual observer with a year of experience. I live in bortle 6-7 skies. My refractors used were a 120 f8 and 102 f6.5 with starguider ed eyepieces viewing Jupiter. The 120 has an svbony 2" dielectric mirror diagonal. The 102 has a 1.25" svbony dielectric mirror diagonal. As a planetary oberver I knew what to expect from this equipment. Both have a noticeable amount of mostly purple chromatic abberation. I wasnt expecting this filter to make my refractors like an ED but to help relieve some false color, which it did. I held the filter over my eyepieces on each scope to compare. Both views showed minimal purple halo around the diameter of Jupiter. It was almost not noticeable in the 120. As with most of these color correction filters it seems to be a trade off. The filter did remove the purple fringe mostly but added a yellowish tint. I compared the yellow #8 and found the svbony color correction filter was more clear and wasnt as yellow as the #8. The svbony filter has a pinkish hue on the back so I decided to stack my moon and skygliw filter with the #8 yellow. The view was darker and removed detail i could see with just the color correction filter. I saw this filter for pre-order on the svbony website and knew at this price it was worth a try. I havent had a chance to use it on the moon yet. The purple fringe is my biggest issue and this f

Great product

The filter looks well made and of good quality. I haven't tested it yet because it's been cloudy and rainy. It took like 3 weeks to arrive to Mexico, I think it is a reasonable time. I will be using it with my sv503 80ed

Specifications

Brand  SVBONY SVBONY
Model  SV231 SV231
Filter Usage  Color Correction Filter Color Correction Filter
Type of Filter  Bandpass Bandpass
Size 1.25" 2"
Substrate Thickness 1mm 1mm
Clear Aperture 26mm 44mm
Wavelength Range 300-1200nm 300-1200nm
Blocking >OD2 >OD2
Peak transmittance >95% >95%
Surface Quality 60/40 60/40
Surface parallelism 1/2λ 1/2λ
Thread  M28.5x0.6 M48x0.75
Single Thread  Yes Yes
Net Weight 4.2g /0.15oz 9.9g /0.35oz

Features

1.Hight Quality Coating: Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. 
2.The color correction filter blocks defocused light in the blue spectrum, as well as in the red part of the spectrum (IR) above 700nm, usually seen in small achromat telescopes.
3.The smaller details on craters of the Moon and planetary surfaces are so much more visible.
4.Can be used well before the focal point of the optical system, without any loss of sharpness, as a single filter in front of a binocular for a focal projection with digital cameras.
5.The NIR is fully blocked up to 1150nm. Details on planets are shown much clearer when using CCD/CMOS-cameras.

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