Subaru.

Subaru is an 8.2m telescope owned by the national observatories of Japan. The surface of the huge mirror is maintained in position by an active support system which maintains an extremely accurate surface.

Figure 2.7: Diagram of the Subaru Telescope

Through use of its adaptive optics and its unusual cylindrical `dome' Subaru is capable of providing a total angular resolution of $\approx 0.2$ arcseconds at 2.15$\mu\$m though this is still limited by atmospheric turbulence and illustrates what a first rate site for astronomy Mauna Kea is.

Situated, as the name suggests, at the prime focus of the telescope, the Subaru Prime Focus Camera (SuprimeCam, Miyazaki 2002) consists of 10 CCDs of $2048 \times 4096$ pixels arranged in a $5 \times 2$ fashion. These 80 million+ pixels have a scale of 0.2 arcseconds giving a field of view of $34 \times 27$ arcminutes. Broadband filters are available in $B, V, R, I, g, r, i, z$.

Figure 2.8: Transmission profiles of the $UVRI$ Johnson-Cousins filter set available for SuprimeCam at the Subaru Telescope.