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   TAL telescopes: TAL-120
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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

Aperture, mm

120

Focal length, mm

805

Focal ratio

1:6.7

Resolving power

1.2"

Limiting visual magnitude

12.3m

Magnification, min

32x (f=25mm)

Magnification, max

162x (f=15mm and Barlow 3x)

Optical scheme

Newtonian

Angular visual field, max

136' (f=25mm)

Angular visual field, min

15' (f=15mm and Barlow 3x)

Minimum observing distance, m

65

Range of slow-motion control on the axes within

4

Latitude range of mounting

0...70

Magnification of the finderscope

6x

Angular field of finderscope

8

Voltage of the supplying mains, V

220 (110) 10%

Current frequency, Hz

50 (60)

Output voltage of the supply unit, V

12

Dimensions, mm

640x780x1400

Dimensions of the plywood case, mm

870x460x320

Weight of the telescope, kg

20

Weight of the telescope packed, kg

22

 
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