Description
PRODUCT DESCRIPTION
THE OPTOLONG L-EXTREME IS A DUAL-BANDWIDTH 7NM FILTER THAT CAN BE USED WITH COLOR SINGLE-SHOT CAMERAS SUCH AS DSLRs (DIGITAL SINGLE-LENS REFLEX CAMERAS) AND MONOCHROME CCD CAMERAS. IT IS ALSO SUITABLE FOR "FAST" OPTICAL SYSTEMS. THE NATURE OF THIS FILTER MAKES IT POSSIBLE TO PHOTOGRAPH EMISSION NEBULAE EVEN IN SKIES WITH STRONG LIGHT POLLUTION. OPTPLONG BELIEVES THAT THE L-EXTREME FILTER DESIGN WOULD BE A BETTER CHOICE FOR FAST, COMPETITIVELY PRICED SYSTEMS. THE OPTOLONG L-EXTREME FILTER ISOLATES THE EMISSION LINES OF THE H-ALPHA AND OIII NEBULAS BY MAXIMIZING THE CONTRAST AND SENSOR-TO-NOISE RATIO BETWEEN NEBULAS.FOR PEOPLE WHO LIVE IN VERY LIGHT-POLLUTED AREAS OR WHO WANT TO TAKE PHOTOS ' LA LUNA, L-EXTREME IS AN EXCELLENT FILTER.
UNLIKE THE L-ENHANCE FILTER WHICH IS A THREE-BAND FILTER (IT TRANSMITS HB, HA AND OIII), THE L-EXTREME FILTER IS A DOUBLE-BAND FILTER WHICH ALLOWES H-ALPHA AND OIII EMISSION LINES TO PASS.
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