XW Eyepiece Specifications | ||||||||
Eyepiece Lens | XW3.5 | XW5 | XW7 | XW10 | XW14 | XW20 | XW30-R | XW40-R |
Lens Structure: | 8 elements | 8 elements | 8 elements | 7 element | 7 elements | 6 elements | 7 elements | 6 element |
5 groups | 5 groups | 6 groups | 6 groups | 6 groups | 4 groups | 6 groups | 5 groups | |
Focal Length: | 3.5mm | 5mm | 7mm | 10mm | 14mm | 20mm | 30mm | 40mm |
Apparent Field of View: | 70˚ | 70˚ | 70˚ | 70˚ | 70˚ | 70˚ | 70˚ | 70˚ |
Eye Relief: | 20mm | 20mm | 20mm | 20mm | 20mm | 20mm | 20mm | 20mm |
Attachment Diameter: | 1.25” (31.7mm) | 1.25” (31.7mm) | 1.25” (31.7mm) | 1.25” (31.7mm) | 1.25” (31.7mm) | 1.25” (31.7mm) | 2” (50.8mm) | 2” (50.8mm) |
Filter Diameter: | 28.6mm | 28.6mm | 28.6mm | 28.6mm | 28.6mm | 28.6mm | 48mm | 48mm |
Field Stop Diameter: | 4.3mm | 6.2mm | 8.8mm | 12.4mm | 17.6mm | 24.0mm | 36.2mm | 46.5mm |
Eyepiece Ring: | Helicoid type | Helicoid type | Helicoid type | Helicoid type | Helicoid type | Helicoid type | Helicoid type | Helicoid type |
Height & Width: | 5.4”x2.4” | 5.0”x2.4” | 4.7”x2.4” | 4.3”x2.4” | 3.8”x2.4” | 3.4”2.4” | 4.8”x3.0” | 4.6”x3.0” |
Weight: | 14.3 oz. (405g) | 14.0 oz. (395g) | 13.8oz. (390g) | 13.8 oz. (390g) | 12.9 oz. (365g) | 12.6 oz. (355g) | 26.1 oz. (740g) | 24.7 oz. (700g) |