A lens apparatus is mountable to a camera body. The camera body has multiple electric contacts. Of these multiple electric contacts, when mounting the lens apparatus to the camera body, electric contacts used for second communication or third communication come into contact with an electric contact provided to the lens apparatus before electric contacts used for first communication, when mounting the lens apparatus to the camera body.

A system for printing PSA on a substrate includes a rigid support structure. The system also includes a plurality of dispensing heads disposed within the rigid support structure and configured to deposit PSA solution on the substrate in response to applied pressure. Each dispensing head of the plurality of dispensing heads includes a support structure and a wicking structure disposed within the support structure and configured to hold the PSA solution, wherein the wicking structure is configured to deposit the PSA solution in a desired shape on the substrate upon contact with the substrate.