{"product_id":"antlia-ir-pass-685-nm-filter-1-25-ir685-125","title":"Antlia IR Pass 685 nm Filter - 1.25\" - IR685-125","description":"\u003cp\u003eThe Antlia IR Pass 685nm filter is an absorptive filter that allows infrared light with wavelengths of more than 685nm to pass through. At these longer wavelengths, the sensitivity of the unaided eye is reduced, so it is not suitable for visual observations. The filter is highly recommended for any planetary photography. At long-wavelength spectral range the atmospheric air turbulence (seeing) has much lower impact on the sharpness. The closer to the infrared band, planetary images are less disturbed by wavefront distortions in the atmosphere (seeing), result in the sharpest and highest contrast image possible.\u003c\/p\u003e\n\u003cp\u003eBy combining a luminance image taken with the IR-Pass filter, along with RGB and U-Venus filters, overall image sharpness is significantly enhanced and details of planets in different bands are taken.\u003c\/p\u003e\n\u003cp\u003eThe filter is also possible to image the other planets during daylight due to the dark background sky created by the 685nm IR Pass Filter.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSchott optical substrate\u003c\/li\u003e\n\u003cli\u003e1.25” mounted, (2mm+\/-0.05mm)\u003c\/li\u003e\n\u003cli\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003e2 sides fine-optically polished to ensure accurate 1\/4 wavefront\u003c\/li\u003e\n\u003cli\u003e30 arcsec parallelism\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1.25”( 28.5*0.6 )\u003c\/li\u003e\n\u003cli\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eLaser Engraving No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOT RECOMMENDED FOR:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolar Observing and imaging\u003c\/li\u003e\n\u003cli\u003eVisual observations\u003c\/li\u003e\n\u003cli\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003c\/li\u003e\n\u003cli\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":67645056385137,"sku":"ANT-IR685-125","price":55.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/IR685.jpg?v=1791585077","url":"https:\/\/khanscope.com\/fr\/products\/antlia-ir-pass-685-nm-filter-1-25-ir685-125","provider":"Khan Scope Centre","version":"1.0","type":"link"}