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Optical system | 5 elements with 3 ED lenses |
Aperture | 130 mm |
Focal length | 650 mm |
Focal ratio | f/5.0 |
Image circle |
110 mm (60% illumination) |
Back focus | 175 mm |
Resolution | 0.89 arcseconds |
Limiting magnitude | 12.3 |
Light gathering power | 345x |
OTA length |
830 mm (fully extended) |
Weight | 12.7 kg |
Focal length | 474 mm |
Focal ratio | f/3.6 |
Image circle | 44 mm |
Focal length | 1040 mm |
Focal ratio | f/8 |
Image circle | 44 mm |