I have a Nikon Ftn equiped with a 43-86mm f/3.5 Zoom-Nikkor Auto. I'm using them for B&W photography. The meter does not work, as it needs batteries which aren't sold anymore. I also have a Gossen Lunasix3, which also does not work for the same reason. How can i get them to work, has anyone found (possibly someone with the same camera or meter) found a way to make it work? Is it possible for me to take good photos, by guessing?