Product no.: 63191Manufacturer: Astronomik
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In contrast to purely visual filters, photographic CCD filters have built-in IR-blocking, which prevents the optical problems caused by infrared radiation.
MRF-coating: thanks to the new MFRF coating technology, it is possible to use the filter on all devices up to an aperture of f/4.
Alternative: The line filters with 12nm full width at half maximum are interesting if you are using a DSLR or a CCD camera with a higher dark current. The 12nm filters are also the best choice if your camera has a built-in guiding chip, because when using the 12nm filter you typically have twice as many stars in the image.
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