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Antlia IR-Pass 850 1.25" Filter
The Antlia IR-Pass 850 filter blocks visible light and allows only infrared wavelengths to pass through, revealing a whole new world of planetary features often obscured by atmospheric turbulence.
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The Antlia IR-pass 850 filter 1.25" is designed to boost the contrast in planetary imaging as infrared radiation is less affected by atmospheric turbulence (seeing). All planets will appear sharper with the highest possible contrast.
• Mercury will reveal its faint details only with an IR-pass filter. This filter is particularly useful for daytime observations as it darkens the background of the daylight.
• Venus can show details on its clouds, especially if combined with the Antlia UV Venus filter.
• Mars is the planet that benefits the most by the use of this filter showing many more details in the infrared than in visible light. Especially during sand storms which can encircle the entire planet and covering features.
• Jupiter appears much more detailed and sharper with the IR-pass filter. Turbulence on the bands, minor vortexes and small detail are visible only at this wavelength.
• Saturn offers its maximum sharpness in infrared and in larger apertures, this filter helps to reveal the Cassini division.
• Uranus and Neptune are distant and without any high-contrast details. Only the IR-pass filters can produce interesting pictures.
Specifications:
| Passing band | > 850 Nm |
| Glass thickness |
2.0 mm ±0.05
|
| Optical flatness |
1/4 λ (wavefront)
|
| Surface quality | 60/40 (in accordance with US military watch MIL-O-13830) |
| Parallelism | 30" |
| Glass type | Schott monolithic optical substrate (non glued) |
The human eye is not sensitive to infrared light so this filter is specifically designed for cameras combined with medium or large telescopes. For instruments with small aperture (less than 150mm), the Antlia IR-pass 650 is preferable.
The tight tolerance of the filter substrate assures a maximum deviance of ±0.05 from specifications making these filters parfocal.
DO NOT LOOK AT THE SUN WITH THE ANTLIA FILTERS. Serious eye damage will occur.
Antlia: Experts in Astronomy Filters
Antlia Astronomy Filters are built by Deep-Sky Photography Enthusiasts for Enthusiasts of Astrophotography all around the globe. Antlia prides itself on producing a series of exceptional quality, fully multicoated narrowband, dual-band, planetary and LRGB filters for astrophotography, designed for use with a range of monochrome and colour DSLR, CMOS and CCD cameras.
Product Code: ANT-IR850-1.25