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Direct Imaging Mode

In this capacity, the CCD is mounted at the focal plane of the prime focus, directly above the filter wheel and the Wynne corrector. Only imaging can be done when the instrument is in this mode. There is only a small amount of vignetting in the corners of the array. The relevant parameters are listed in Table 1.

Table 1
Direct Imaging Mode
Quantity Value
Focal plane plate scale 11.86'' mm-1
Pixel scale (measured) 0.2846'' pixel-1
Field-of-view 9.7' x 9.7'
Usable modes imaging only

Roy Gal