An optical apparatus which is capable of, when performing manual focus shooting, freely adjusting a rack focus speed and stabilizing a final focusing accuracy for a shooting subject. Each magnet has two opposing magnetic surfaces with opposite magnetic poles. A distal end of the lumen is closed and a portion of the catheter body includes a plurality of openings thereby defining an infusion section of the catheter. The guide rail is configured to guide the pluggable module within the receptacle assembly. If a determination is made that a problem ticket cannot be automatically generated, other program instructions notify or initiate notification of an operator and supply event information for the operator so that the operator can determine whether to generate a problem ticket. The system and method may comprise preparing a site for green community construction, acquiring housing for the site, wherein the housing is acquired below assessed value, moving the housing to the site, and remodeling the housing at the site to form the green community.