A zoom lens is disclosed having a zoom ratio larger than four with a field of view at the short focal length position larger than 85 degrees and with a minimal number of moving groups. Also provided herein are vectors and host cells comprising those nucleic acid sequences, chimeric polypeptide molecules comprising the polypeptides of the present invention fused to heterologous polypeptide sequences, antibodies which bind to the polypeptides of the present invention and to methods for producing the polypeptides of the present invention. The target includes at least one groove extending obliquely with respect to its rotational axis. An output signal is then formed through a switching action, whereby durations of positive and negative portions of the output signal duty cycle are defined by crossover points between the input signal and the switching level. One or more particular search indices from the server are downloaded onto the client in response to the client’s request to download the one or more particular search indices to be used for searching on the local machine. The fin transistor structure comprises a fin formed on a semiconductor substrate, wherein a bulk semiconductor material is formed between a portion of the fin serving as the channel region of the transistor structure and the substrate, and an insulation material is formed between remaining portions of the fin and the substrate.