ZWO LRGB 36mm Filters - LRGB36 81 mm Refractors and even star removal are

and even star removal are now free and built right in

or a soft and even movement will be allowed

Two additional primary factors played into the equation – Eye Relief (and the related large eye lens size) and Ease of Viewing (a combination of long eye relief and control of pupil aberrations)

This system will give you a 36 mm illuminated field and 55 mm of back focus

Once you’ve determined the perfect position

ZWO LRGB 36mm Filters - LRGB36 81 mm Refractors and even star removal areThe ZWO LRGB 36mm unmounted filters have better transmission, better coating, better color separation. The RGB color combine weights will be approximately 1: 1: 1 Fine optically polished to ensure accurate 1 4 wavefront More than 92% transmission at passband Infrared wavelength 700 1100nm cut off Precision off band blocking Multi layers anti reflection coating Small spectral gap to minimize effect of light pollution More parfocal thickness 2mm