is there a sticky that explains all the parts of a housing and how they fit together?
For example, how do you choose an extension ring and port? Is the extension ring based on the lens length and the port based on the lens diameter?
Are there ports where you don't need an extension ring?
For example, how do you choose an extension ring and port? Is the extension ring based on the lens length and the port based on the lens diameter?
Are there ports where you don't need an extension ring?