Astronomik SII 6 nm CCD EOS M Clip Filter

Astronomik SII 6 nm CCD EOS M Clip Filter

Please Note: The "M" series of Astronomik filters are designed to work with the new mirrorless cameras from Canon.

• This ultra narrow 6 nm SII Clip Filter from Astronomik is intended to be used with Canon EOS series cameras as a CCD astro-imager of ionized sulfur objects

• Compatible with Canon EOS M series camera models M1, M10, M3, M5, M6, and M50, along with all lenses with an EF-M bayonet, and any lens with EF and EF-S bayonets via the use of an optional adapter

• Created with regards to the finest technical standards in order to enable the required optical efficiency for deep sky CCD imaging with your Canon EOS M series camera

• Transmits ionized sulfur (SII) light while cutting off the full remainder of the visible spectrum plus IR at the same time

• Exceptionally narrow bandwidth of 6 nm

• Works great for capturing astro-photos of planetary nebulae and supernova leftovers

• Astronomik filters all come with a durable, supreme quality plastic storage case

• Features superb optics made in Germany!

More About Astronomik SII 6 nm CCD Filters

Astronomik SII 6 nm CCD Filters are the optimal solution for CCD astrophotography applications. Features a reduced 6 nm FWHM (full width at half maximum). Using this filter guarantees 90% transmission or more at SII (671.7nm-673.0nm). This filter is made to Astronomik's exacting standards. While transmission ratings may vary between each filter, you are guaranteed a transmission rating greater than 90%, with a typical transmission rating of around 94% for the 6 nm SII. The specific T-Max will be listed on the filter case. You can rest easy knowing that every unit is thoroughly tested and guaranteed to meet Astronomik's stellar benchmark of performance! This provides an extremely dark background. Transmission losses and chromatic distortions, while an issue with other filters, only arise with Astronomik filters when especially bright aperture ratios of 1:2 or more come into play.

With its smaller 6 nm FWHM, this Astronomik SII CCD Filter is ideal for exhibiting the maximum amount of contrast between objects that emit SII light, such as emission nebulae and the skyglow background. 6 nm filters offer similar performance when compared with 12 nm filters, but also provide a higher contrast gain. On the contrary, using a 6 nm FWHM filter can cause background stars to appear dimmer or not be viewable at all. Thus, to achieve maximum contrast without sacrificing the background quality of your final image, it is best to employ both the 6 nm and 12 nm SII filters together.

All unwanted visible and IR band spectral wavelengths are fully blocked with the Astronomik SII 6 nm CCD Canon EOS M Clip Filter. As with all filters from Astronomik, this filter is parfocal with all other Astronomik filters. Diffraction limited, Astronomik SII CCD filters will not compromise the optical efficiency of your telescope. Coatings protect this filter from damage caused by scratching, aging, and high humidity remarkably well. All Astronomik filters come in a long-lasting, high quality plastic filter container.

Astronomik EOS M Clip Filter System

Made from black anodized aluminum and laser-cut on state-of-the-art machines, Astronomik's unique Clip-Filter system can be placed directly into the camera body of Canon EOS M series M1, M10, M3, M5, M6, and M50 models in only seconds. Adjustments are not needed, and all lens functions such as focus, screen, and image stabilization, stay operational! This EOS M Clip-Filter system is also suitable for use with all currently known EF-M lenses, along with all other lenses with EF and EF-S bayonets by using an adapter. This system also serves as a suitable dust shield, preventing dust from gathering on your sensor when taking long exposures.

Transmission Specifications

• Normally, SII (672 nm) line transmission is 96%

• Completely obstructs undesirable light from UV up to IR