Hi all,
i've recently acquired a Pentax 6x7 to add to my collection. I have a 75mm F4.5 and a 135mm F4 Macro lens for it. I've been offered a 45mm F4 but it doesn't focus - well not strictly correct, it does but only at about 0.6m.
The focus ring turn and stops at infinity and at the closest focus distance, but this doesn't appear to have any effect on the actual lens length or the focus. It looks like that the focus ring isn't attached to the lens elements.
I've worked on a few cameras and lenses over the years, but this has me stumped. You'd expect to see a screw under the rubber focus band, but there is none and initial web investigations have shown others stuck with the same issue. Removing the lens front "beauty ring" doesn't reveal anything either. Does anyone know how this works, of perhaps if there's a technician somewhere who can fix it?
Thanks
Graeme Arlidge
i've recently acquired a Pentax 6x7 to add to my collection. I have a 75mm F4.5 and a 135mm F4 Macro lens for it. I've been offered a 45mm F4 but it doesn't focus - well not strictly correct, it does but only at about 0.6m.
The focus ring turn and stops at infinity and at the closest focus distance, but this doesn't appear to have any effect on the actual lens length or the focus. It looks like that the focus ring isn't attached to the lens elements.
I've worked on a few cameras and lenses over the years, but this has me stumped. You'd expect to see a screw under the rubber focus band, but there is none and initial web investigations have shown others stuck with the same issue. Removing the lens front "beauty ring" doesn't reveal anything either. Does anyone know how this works, of perhaps if there's a technician somewhere who can fix it?
Thanks
Graeme Arlidge