I would contact Tamron to see if they will fix it. The zoom creep is
probably deteriorating helical/zoom grease so it needs to be
disassembled, cleaned and relubed. The loss of parfocal behavior
between long and short sounds to me like something has come loose
inside. Hopefully, it's only something loose and not broken. Even
Tamron might not have parts anymore. But readjustment will probably
require technical knowledge of this specific lens.
Chuck Norcutt
Fabio Fiorellato wrote:
> Hi list,
>
> I've recently discovered that my Tamron SP 35-105mm f/2.8, apart from having
> a mild amount of zoom creep, is not keeping correct focus when zooming from
> one end to the other.
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