Feature(may vary by option.)

●SV183 IR pass filter; Sufficient reduction of seeing effects; heightened contrast; The Filter can darkens the twilight sky background; allowing mages of moon and planets to be taken at dawn or dusk
●Sturdy standard 1.25-inch filter; SV183 filter measures 1.25 inches and is suitable for standard 1.25-inch equipment
●Sturdy construction; The filter frame is made of high-grade alumina metal material; which is durable
●In addition to astronomical uses; the IR-Pass filter can be used for nature photography in the Near-IR; revealing stunning differences in plants; sky; and clouds
●SV183 filter cell is made of lightweight; strong metal and is CNC machined; sand-blasted; black anodized; The result is a super thin filter cell that will produce a clear aperture of 26mm

[1.25inch]




[2inch]





Description

telescope filtertelescope filter

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.

telescope filtertelescope filter

Multi-coated glass

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.

telescope filtertelescope filter

Thread: M28.5*0.6

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.

Filter Series

telescope filter

UV IR Cut Block Filter

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Planetary Filter

telescope filter

CLS Broadband Filter

telescope filter

Linear Polarizer Filter

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Price
$15.99 $14.99 $29.99 $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

Specification

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