Optical System
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Optical design: Refractor (achromatic)
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Diameter (Aperture): 102 mm (4.01")
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Focal length: 660 mm
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Focal ratio: f/6.5
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Optics coated with XLT: Improved light transmission
Focusing & Lenses
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Eyepiece 1: 25 mm → ~26× magnification
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Eyepiece 2: 10 mm → ~66× magnification
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Maximum useful magnification: ~240×
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Minimum useful magnification: ~15×
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Diagonal: 90°, 1.25"
Observation Mode
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Finder: StarPointer™ red dot
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Mount: Manual azimuth (AZ) with aluminum tripod
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Smartphone adapter: Yes — for use with the StarSense Explorer app
Optical Performance
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Limiting magnitude: ~12.5 mag
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Resolving power (Rayleigh): ~1.37″
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Light gathering power: ~212× compared to the human eye
General
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Tube length: ~813 mm (32″)
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Tube weight: ~2.26 kg
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Total weight (with tripod): approximately 6.44 kg