Optolong IR Pass 685nm Filter

OptolongSKU: Optolong IR Pass 685nm 1.25"

Size: 1.25"
Sale price$101 CAD
In stock (3 unit), due to high volume of solar product orders we are shipping within 1-2 business days of receiving orders


The Optolong IR Pass 685nm filter is used to block wavelengths below 670nm and is designed for IR-LRGB imaging in order to produce a sharper luminance image for the best planetary contrast.  This is because atmospheric seeing and distortion is much reduced at longer IR wavelengths.

CCD and CMOS sensors are capable of detecting light in the 350-1100nm range including infrared wavelengths.  Taking RGB planetary images with IR as the luminance channel will have improved contrast and better surface detail than LRGB images.

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