An inter-resonator coupling scheme for a filter is disclosed. The combinatorial possibilities offered by placing the various catalytic activities of PKS systems on separate vectors permits the construction of improved libraries of PKS and polyketides. The dipping apparatus is provided with a positioning and fixing device to position the conveying traveling body 2 onto the guide rail 17a on the rotation base 15 at a fixed position and to fix the conveying traveling body 2 to the rotation base 15. Various characteristics that may be displayed concurrently include geological feature position, shape, coordinates, thickness values, petrophysical values, amplitude values, and velocity values. The final lens position is determined by comparing focus metric information from each of the frames obtained at the various predetermined nonuniform focus lens positions and selecting the frame with, for example, the best focus metric as the lens position to be used for the final picture or image capture.