Not sure if posted in the correct area of the forum, but thought I would mention that some years ago I needed reading glasses. Having recently bought a Zeiss Ikonta, I find it difficult to read the numbers of aperture and speed without reading glasses and not wanting to take glasses with me when walking round with a camera, I bought one of those small flat plastic magnifiers based on the Fresnel screen principle. Cutting this in half gives me a 1” square bit of plastic that I carry attached to the strap to read the numbers. I thought this tip may be useful info to others who need reading glasses.