- 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.
Correct Chromatic Aberration
Block Light Pollution and Reduce Noise
OD Optical Density > 4
UV and IR Cut
AR Coating
Plasma Coating
Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters.
Double-sided Thread Design
Focus Photography of Digital Camera
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.
Use With SV48P Telescope
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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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.