The secondary optical system, the Schupmann system, has been
installed in the telescope. This system corrects for the very large
variation of focus with wavelength of the singlet lens and also allows
compensation for atmospheric dispersion. The Schupmann corrector is
used for focusing of the telescope.
This G-band picture, of which the one above is a part, was obtained on April 5, the first day of observations following installation and adjustment of the Schupmann system. The pupil diameter was stopped down to 60 cm. Although the seeing was only fair, solar fine structure can be seen down to the diffraction limit (about 0.18 arcsec) over most of the field. Tick marks are 1 arcsec apart.
The image is available at a number of different resolutions: 523×526 pixels (282 Kbytes) 1032×1039 pixels (1 Mbyte) 2048×2063 pixels (3 Mbytes - BIG)
The cooling system of the telescope is not yet fully installed. Until that system is fully operational, the telescope will be used at 60 cm aperture. The tip-tilt mirror will be installed during the later part of April and the 19-electrode adaptive mirror during May. After these installations, the telescope will be used with its full 1-meter aperture.
