Astronomik OIII 12 nm CCD Filter - Canon EOS R XL Full Frame Clip

Astronomik OIII 12 nm CCD Canon EOS R XL Full Frame Clip Filter

• EOS R XL full frame clip formatted Astronomik OIII 12 nm CCD Filter for Canon EOS R and RP mirrorless cameras

• Filter operation does not depend on any housing modifications

• Insertion requires only a finger while removal is done with the aid of an included small hook

• Nearly 100% OIII line transmission

• FWHM bandwidth of approximately 12 nm

• Optimally suited for imaging planetary nebulae as well as the vestiges of supernovae

• Coatings offer exceptional protection against scratching, aging, and humidity

• Diffraction limited, the filter will not reduce your telescope's optical efficiency

• Made in Germany, a country known for producing high quality optics!

More About the Astronomik OIII 12 nm CCD Filter

The Astronomik OIII CCD filter is a narrow band emission-line-filter for CCD photography. The filter lets the light of double ionized Oxygen of emission nebulae pass and blocks nearly the whole remainder of the spectrum where the CCD is sensitive. The full width at half maximum (FWHM) of 12 nm is ideal for common CCD cameras and allows the use of very fast optics. The optimal aperture ratio for the use of the filter is 1:3 to 1:15. It should be noted that the filter has a transmission of up to 99%, which cannot be attained by stacking more narrow-band filters. A further note, which led to selecting the half width (FWHM), is the dark current of common CCD imagers. Exposures with a CCD cooled to -15°C are limited by the dark current of the CCD, even in large cities with a bright background. Another advantage of the 12 nm filter is the better availability of guiding stars for cameras with built-in-autoguider.

Emphasizing the contrast between objects in the OIII emission line and the skyglow background, the Astronomik OIII CCD Filter offers complete suppression of emission lines from spurious light sources like mercury (Hg), sodium (Na), and airglow. Loss of transmission and chromatic distortions, which can be a problem with filters available from other manufacturers, are only an issue with Astronomik filters when excessively bright aperture ratios of 1:2 or more are in play. Since this filter has a built-in IR-blocker up to 1150 nm, an extra IR-blocker is not required.

When employing the Astronomik OIII 12 nm CCD Filter in conjunction with an H-Alpha or SII CCD filter, even imaging in an environment with very heavy light pollution will not prevent you from obtaining three-color images of emission line gas nebulae. To accomplish this, you need to capture an image in three different wavelengths, choose each as a color-channel in Photoshop and paste them together as one individual color image. This filter is diffraction limited and will not lower the optical efficiency of your telescope! Astronomik filters arrive with a long-lasting plastic storage box of supreme quality.

Astronomik EOS R/RP Clip Filter System

Astronomik EOS R XL clip filters are suitable for use with full frame mirrorless Canon EOS R and RP camera models. Facilitates imaging from both urban and rural areas, and does not require any modifications to the camera housing for use. Once the filter has been slid into place and is level, you can then reinstall the camera lens and you'll be ready to start imaging.

Without any tools and using only a finger, this filter can be easily installed. Removal does require the aid of an included small hook, but only initially. As soon as the filter is out far enough for you to grip with your fingers, you can go ahead and take it out the rest of the way and place it back in the case.

Compatible Canon EOS Bodies

• EOS R

• EOS R5

• EOS R6

• EOS RP

• EOS Ra