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Astronomik OIII-CCD 6nm EOS Clip

In stock
can be shipped within 1-2 days

Price includes VAT, plus delivery

The Astronomik Clip FIlter system is a unique way to use filters with Canon EOS cameras. It allows the use of filters without the need for a filter drawer or large lens mounted filters. Additionally, if your Canon DSLR has been modified to remove the internal UV / IR filter, it allows for a replacement White Balance filter to be fitted so the camera can be used in Daylight as normal.

The CCD version of the filter is necessary if you have a fully modifed EOS camera with both standard filters removed as this will allow IR to pass. This can cause poor image quality during long exposures so must be blocked.

The OIII-CCD Filter is suitable for imaging of OIII nebulas from observation sites with light pollution and from dark sites as well. The contrast between an object glowing at 501nm and the background is increased enormous! Due to the combination of the narrow bandwidth of 6nm and the high transmission of typically 96% the filter gives you an enormous contrast boost, as all unwanted light from other wavelengths than is blocked form UV up to the IR. This results in an extremly dark background. The FWHM of 6nm is matched to give you optimal performance with CCD and CMOS sensors with a very low dark current! The 6nm filter is the best choice if you are observing from a heavily light polluted site or if you are imaging faint objects in starcrowded regions of the milkyway. Due to the new MFR coating technique you may use one single filter on all instruments up to f/4 without a significant reduction in performance. Der Astronomik H-alpha filter MUST NOT BE USED for solar observation!

Technical data

Guaranteed Transmission of more than 90% at the OIII Line (501 nm)

Typical Transmission of 96% at the OIII Line (501 nm)

Full-Width-Half Maximum (FWHM): 6nm

Perfect blocking of unwanted light from UV up to the IR

Parfocal with all Astronomik filters

MFR Coating technique

Usable with all optics up to f/4

Thickness of 1mm

Not sensitive to moisture.Scratch resistant, non aging, opticaly polished substrate, striae-free and free of residual stresses

High quality storage box

The patented Astronomik Clip-Filter System is black anodized aluminum and laser-cut on state-of-the-art modern machines. It can be inserted within seconds directly into the EOS camera body. There are no changes necessary and all lens functions (focus, screen, image stabilization) remain functional!

Almost all Canon system lenses (with the exception of the EF-S series) and all M42 and T2 lens adapters, can be used with the Astronomik Clip-Filter System. The Clip-Filter System also acts as an outstanding dust shield, which prevents the possibility of dust settling on the sensor during long time exposure (The MC-Clear filter does not have a filter effect and only acts as a dust shield.)