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1.25" 9mm 8-Element eyepiece, 86 Degree Apparent Field, 10mm eye relief, eyeshield, rubber grip, Fully Multicoated, camera adaptable
Speers-Waler Series4 1.25" 9mm offers a wider 86 degree AFOV than Series3 with all the same features. Focal length 9.1mm; Eye relief : 10mm. Elements: (8) The Series4 9mm performance: Edge field curvature (546nM): Sagittal,-0.10mm, Tangential: 0.19mm. Edge lateral color: 0.007mm. Chromatic focal shift (420-656nM)
