Distance setting indicator in viewfinder - uses flexible optic fibres between taking lens and viewfinder

摘要

A distance setting indicator for a camera viewfinder comprises a set of flexible light conductors between the viewfinder and the front of the lens support. The distance setting control progressively covers one or more of the light fibre ends in turn and their corresponding light point pattern is displayed in the viewfinder. The system can be used for extending the taking lens range for large format or popular size cameras. It provides a simple non-mechanical link between the lens and the viewfinder without any complex alignment or electric circuits required.