|
| |
Eyepieces
- TAL Optics
Astronomical
Telescopes and Accessories
Telescope Accessories
Eyepieces - TAL Optics
TAL Optics
All products are standard 1.25"/31.7mm Format.
| |
Product
Codes |
| 15mm
Kellner Eyepiece |
450 |
| 25mm
Plossl Eyepiece |
381 |
| 42mm
Kellner Eyepiece |
451 |
| x3
Barlow Lens |
452 |
|
|
build_table('etistore',array('he450','he381','he451','he452')); ?>
An optical telescope gathers and focuses light mainly from the visible part of the Electromagnetic spectrum (although some work in the infrared and ultraviolet). Optical telescopes increase the apparent angular size of distant objects, as well as their apparent brightness. Telescopes work by employing one or more curved optical elements - usually made from glass - lenses or mirrors - to gather light or other electromagnetic radiation and bring that light or radiation to a focus, where the image can be observed, photographed, studied, or sent to a computer. Optical telescopes are used for astronomy and in many non-astronomical instruments, including: theodolites (including transits), spotting scopes, monoculars, binoculars, camera lenses, and spyglasses. There are three main types:
The refracting telescope which uses solely an arrangement of lenses (excluding star diagonals).
The reflecting telescope which uses solely an arrangement of mirrors (excluding eyepieces).
The catadioptric telescope which uses a combination of mirrors and lenses, and usually have a glass corrector plate at the front.
| |
|
