I am using some C++ code to grab an image from my ST-I guide camera but it takes over 50 seconds to perform the grab (writing to disk in FITS format is a second or less). The same code runs well on a STF-8300M and grabs an image in a second or so. Anybody got any suggestions? Both are USB and both are connected to a Linux box. Also, the image that eventually comes back has horizontal lines through it, increasing in frequency with y-axis position, see attached screen grab, doesn't happen with the STF-8300M.