Kwasan and Hida Observatories, Graduate School of Schience, Kyoto University japanese Home page

T3: For H-alpha partial frame observation

Objective lens Effective apature250 mm
Working apature250 mm
Number of lens3
Imaging FOV1000 arcsec
Reliable FOV for wavelength-shift (diameter)1414 arcsec
Effective FOV1414 arcsec
Central Wavelegth6562.81 A
Filter TypeLyot
Apature50.0 mm
Total length of the elements220 mm
FWHM 0.25 A
CCD size36 mm
Pixel Number4000 x 4000
Max. Time Resolution
Optics Total focal length7425.59.63
Total F ratio29.70
Path of light (click!)25cmH alpha paritla path of light