Astronomik MC-Clear filter

The Astronomik MC-(multicoated) Clear filter serves dual purposes: as a dust protector or to maintain the optical depth of your imaging system.

• Dust protection: The robust coating ensures scratch resistance and durability, making the Astronomik MC-Clear filter the perfect choice for protecting your optics or sensors (e.g. Schmidt-Cassegrain telescopes, Schmidt-Newton telescopes, Maksutov systems, and DSLR cameras) from dust particles and airborne contaminants without affecting the sensitivity of the camera or the eye, altering colors or destroying the optical performance of your system.

• Parfocality: The Astronomik MC-Clear glass is manufactured to the same high standards as other Astronomik filters, ensuring it is parfocal with other Astronomik filters. This means it can be used interchangeably with other filters without affecting the focus.

The filter is multicoated to prevent unwanted reflections and does not block infrared (IR) or ultraviolet (UV) light.

Astronomik MC-Clear filter are highly regarded by camera manufacturers worldwide for their superior coating and scratch resistance, available in various custom diameters.

Other uses

It is an alternative to the Astronomik IR-Block or UV-IR Block (L-1, L-2, L-3) filters for photography in systems without refracting optical elements, e.g. Newton telescopes.

Alternatives

Use the Astronomik IR-Block or UV-IR Block (L-1, L-2, L-3) filters for photography in systems with refracting optical elements.

Suitability of the Astronomik MC-Clear filters

• Visual observation: For dust protection only
• CMOS and CCD photography: Good, to compensate the optical thickness of other Astronomik filters; dust protection
• DSLR photography: If applicable, to compensate the optical thickness after modifications; dust protection
• Webcam and video: For dust protection only

Technical Data

• Suitable for all focal ratios
• Typical transmission: >99%
• Glass thickness: 1mm (except Astronomik OWB Type 3 and XT filters)
• Finely polished optical glass, free of any striae, residual stresses, and bubbles
• Extremely scratch-resistant and durable coating
• Completely resistant against high humidity and aging effects
• Parfocal with other Astronomik filters
• Diffraction-limited
• Delivered in a high-quality, long-lasting filter box
• Made in Germany

Astronomik filters are diffraction-limited, ensuring that the optical performance (resolution and contrast) of your telescope is not compromised. Thanks to the high-precision machining of the glas substrate, all Astronomik filters are parfocal. The wedge errors are far below all common tolerances. Therefore, all issues concerning focal distances and the exact alignment of images from each color channel are effectively eliminated.

All Astronomik filters are ideal for modern cameras, including both CMOS- and CCD-based models, ensuring you capture the best possible images with your equipment. Sharpness, contrast, and the absence of any reflections and halos are guaranteed. Even with bright stars in the field of view, nebulae and galaxies will be captured with the finest structures. The Astronomik MFR and MaxFR coatings are designed for optimal performance across a wide range of focal ratios of the optics used.

Every Astronomik filter undergoes a rigorous quality control process before delivery.