Another good advice, thanks!
No substitute for this list's knowledge ;-)
The emery paper is on its way. Translated by using Amazons ASIN number ;-)
Op ma 12 aug. 2019 om 22:17 schreef Jan Steinman <Jan@xxxxxxxxxxxxxx>:
> > From: Jim Nichols <jhnichols@xxxxxxxxxxxxx>
> > My advice is polish a little, clean, reassemble,
> > check, repeat.?
> I've done this without reassembly -- simply put the mount on the camera,
> and hold the lens tight against the mount (after cleaning it carefully, of
> course). You may be introducing subtle de-centreing aberrations, but you
> should still be able to see if you've got infinity.
> Going "too far" is not necessarily a bad thing, either. MOST longer lenses
> need to focus past infinity, due to thermal expansion/contraction concerns.
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