Main / Catalog / Telescopes / Newtonian 5" TAL-120, TAL-120M Telescope
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.
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 | 1°36' (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 |