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• Matched to your camera’s response for equal red, green and blue
• G2V calibrated for “true color”
• Correct OIII emission “teal” color for planetary nebula
• Parfocal – even the narrowbands – and do not require refocusing
• Superior blue transmission for highest signal and guide star selection
• Same guide star exposure for red, green and blue
• Equal color exposures needing only one dark exposure time
• Research quality construction (e.g. ¼ wave) at amateur prices