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Telescopes: TAL-120M |
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The TAL-120 incorporates an integral multi-coated negative achromatic lens in the base of the focuser to provide an effective focal length of 805mm in a very short tube. The result is a Newtonian reflector with an aperture of 120mm (4.7 inches) with a focal ratio of f/6.7 that is just as powerful but lighter and more compact than conventional models. The mounting and accessories are identical to those included with the popular TAL-1 model, except an adaptor for prime-focus photography with a 35mm SLR camera is also included. The TAL-120M includes a motor drive.
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Standard Specification
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Aperture, mm
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120
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Focal length, mm
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805
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Focal ratio
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1:6.7
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Resolving power
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1.2"
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Limiting visual magnitude
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12.3m
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Magnification, min
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32x (f=25mm)
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Magnification, max
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162x (f=15mm and Barlow 3x)
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Optical scheme
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Newtonian
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Angular visual field, max
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1°36' (f=25mm)
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Angular visual field, min
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15' (f=15mm and Barlow 3x)
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Minimum observing distance, m
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65
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Range of slow-motion control on the axes within
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±4°
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Latitude range of mounting
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0...70°
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Magnification of the finderscope
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6x
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Angular field of finderscope
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8°
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Voltage of the supplying mains, V
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220 (110) ±10%
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Current frequency, Hz
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50 (60)
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Output voltage of the supply unit, V
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12
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Dimensions, mm
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640x780x1400
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Dimensions of the plywood case, mm
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870x460x320
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Weight of the telescope, kg
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20
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Weight of the telescope packed, kg
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22
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