[1.25inch]
[2inch]
SV183 IR pass telescope filter can fully reduce the impact of seeing and enhance contrast, and can also be used for near-infrared nature photography.
The SV183 IR Pass 685nm Filter is made with high-end glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength.
SV183 IR Pass 685nm Filter can work with M28.5*0.6 thread for any standard 1.25inch eyepieces.
The SVBONY SV183 IR Pass filter blocks wavelengths below 670nm to enhance contrast and surface detail and reduce the effects of seeing when used in IR-LRGB imaging of the moon and planets. At these longer wavelengths, planetary images are less disturbed by wave front distortions in the atmosphere. Atmospheric seeing and distortion diminish as you move further away from visible light into the infrared, and since CCD and CMOS sensors are sensitive to IR light, imaging in the infrared will improve your results.
UV IR Cut Block Filter | Planetary Filter | CLS Broadband Filter | Linear Polarizer Filter | |
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Price
| $15.99$15.99 | $14.99$14.99 | $29.99$29.99 | $12.99$12.99 |
Size
| 1.25 inches | 1.25 inches | 1.25 inches | 1.25 inches |
Applicable Scene
| Reduces Light Pollution | Enhance Planetary Contrast | Observing Deep Sky Objects | Reduce Glare |
Material
| Aluminium | Aluminium | Aluminium | Aluminium |
Coating
| Multi Coating | Multi Coating | Multi Coating | No Coating |
Glass Thickness
| 1.85mm | 1.85mm | 1.85mm | 2.4mm |
Product Name | IR Pass 685nm Filter |
Glass Thickness | 1.1mm |
Size | 1.25-Inch |
Substrate Thickness | 1.1mm |
Clear Aperture | 26mm |
Wavelength Range | 350-1100nm |
λcut-on | 670nm |
Blocking | OD2@400-660nm |
Peak transmittance | 670nm@T=50% 673-1100nm@T>95% |
Surface Quality | 60/40 |
Surface parallelism | 1/4λ |
Parallelism | 30” |
Material | Aviation Aluminum 6061T6 |
Thread | M28.5*0.6 |
Single Thread | Yes |
Net Weight | 8g / 0.3oz /0.02lb |