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115 EUR
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price without VAT: 94 EUR
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Astronomik ProPlanet 742 Clip-Filter EOS M (Astronomik, SKU: 10204100 / 8h00s6) is an infrared pass filter designed for lunar and planetary imaging, especially Mars, with telescopes of 6" (150 mm) aperture or larger. It transmits only infrared light above 742 nm, significantly reducing atmospheric seeing effects compared to visible wavelengths and resulting in much sharper images.
The filter effectively darkens the sky background during advanced dawn, enabling imaging of planets and the Moon even in daylight conditions.
Lunar and planetary imaging
• reduced atmospheric turbulence effects
• improved sharpness and contrast
• ideal for telescopes from 150 mm aperture
• particularly effective for Mars imaging
Daylight IR photography
In MC or Full Spectrum modified DSLRs, the filter cuts the spectral range where chlorophyll appears green and reveals its high reflectivity in near infrared, producing striking white foliage and bright clouds against a dark sky.
Additional uses
• darkening of twilight sky background
• imaging of young stars in dust clouds and star-forming regions
If atmospheric seeing is severe and the telescope aperture is 10" (250 mm) or larger, the Astronomik ProPlanet 807 filter may be a better choice.
• visual observation: not suitable (human eye is insensitive in this range)
• CMOS and CCD photography: useful for specialized IR imaging
• DSLR (original): not suitable
• DSLR (astro-modified): not suitable
• DSLR (MC-modified): very good for daylight IR photography
• planetary webcam and video: very good – effectively reduces seeing
XT versions use an ultra-thin substrate of 0.3 mm or 0.5 mm to minimize optical aberrations with wide-angle lenses. Standard Clip-Filters may cause star elongation in extreme corners at very short focal lengths.
• transmission: >96% between 742–1100 nm
• blocking range: 350–730 nm
• glass thickness: 1 mm
• finely polished optical glass free of streaks and internal stress
• Astronomik MFR coating
• resistant to humidity and aging effects
• parfocal with other Astronomik filters
• diffraction-limited design
• supplied in a durable protective filter box
Each filter undergoes strict quality control before shipment to ensure high sharpness, strong contrast, and absence of halos even with bright objects in the field of view.
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