Specifications:Aperture: Achromatic doublet 60mmFocal length: 930mm (approximate effective)Effective F ratio: F/15.5Wavelength: 6562.8ÅTuning knob: Wing shift +/- 0.5Å in 0.1Å increments.FWHM: Not specified. Prominence units are generally 0.6Å orabove, Chromosphere units generally 0.5Å or below.Barlow: Integrated, fully baffled 2 element telecentric 4.3X barlowoptimized for 656nmBlocking filter: Integrated 12mm blocking filterClear aperture: 16mm clear etalon apertureFull disk: Passes full solar disk.Eyepiece side: 1.25” female drawtube.Brass compression ring to protect eyepiece.Optional 2" and SCT accessories available.Diagonal recommended to achieve focus.Mounting: Reversible Vixen style dovetail foot with ¼-20 tripodmounting holes.Power: USB power, 5v 1.5amp, female Micro-B connector.Power is required for proper operation.Wall adapter: 90-240VAC wall adapter, includes US, UK, Euro andAustralian plugs.Opt. battery: Optional 8-hour battery pack available.LED indicator: Yellow: temperature settling.Green: ready to observe, filter on band.Red: fault such as low voltage.Settling time: Approximately 5-6 minutes after power up or changeof wing shift.Temperature: Ambient temperature range 40°-100°FDimensions: 78mm wide, 110mm tall, 391-403mm long.Weight: 2.93lb / 1.33 kg.Includes: Scout telescope, power supply, user manual.Warranty: 5 years