T3: For H-alpha partial frame observation
(2003-2010)
| Objective lens |
Effective apature | 250 mm |
| Working apature | 250 mm |
| Number of lens | 3 |
| Imaging |
FOV | 1000 arcsec |
| Reliable FOV for wavelength-shift (diameter) | 1414 arcsec |
| Effective FOV | 1414 arcsec |
| Central Wavelegth | 6562.81 A |
| Filter |
Type | Lyot |
| Apature | 50.0 mm |
| Total length of the elements | 220 mm |
| FWHM | 0.25 A |
| CCD |
size | 36 mm |
| Pixel Number | 4000 x 4000 |
| Max. Time Resolution | |
| Optics |
Total focal length | 7425.59.63 |
| Total F ratio | 29.70 |
| Path of light (click!) |  |
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