The focussing ring on this little Tessar lens became slack some time ago, and - with helpful advice from forum members here - I successfully dismantled, cleaned, re-greased, and re-assembled it. The result was distinct improvement, but not a huge improvement: a little more effort was needed to turn it, but focus still wanders off its last setting as the camera brushes against my fingers or its case. There’s quite a lot of rotational force on it via the lens hood. So I must have used the wrong grade of grease. Those on offer are:
Grade 10: Ideal for lens helicoids where minimum damping and fast focus action is required.
Grade 30: Ideal for lens helicoids where slightly more damping is required (Many Nikon AI lenses for example)
Grade 40: Ideal for zoom sliders and lens helicoids requiring firmer damping.
Grade 250: Ideal for lenses and components requiring significant damping
Grade 500: Ideal for rotational controls such as aperture rings etc.
Grade 1500: Ideal for rotational controls requiring more damping.
Grade 3000: Ideal for maximum damping, macro sliders etc.
I previously used Grade 30 (and of course I have to remove that now). Any advice which grade I should try next? I don’t want to have to do this repeatedly.
Grade 10: Ideal for lens helicoids where minimum damping and fast focus action is required.
Grade 30: Ideal for lens helicoids where slightly more damping is required (Many Nikon AI lenses for example)
Grade 40: Ideal for zoom sliders and lens helicoids requiring firmer damping.
Grade 250: Ideal for lenses and components requiring significant damping
Grade 500: Ideal for rotational controls such as aperture rings etc.
Grade 1500: Ideal for rotational controls requiring more damping.
Grade 3000: Ideal for maximum damping, macro sliders etc.
I previously used Grade 30 (and of course I have to remove that now). Any advice which grade I should try next? I don’t want to have to do this repeatedly.