Today I became aware that my 75 / 150 no longer focuses at infinity at
the infinity marker on the lens barrel. Focusing at infinity is about
midway between the 30m mark and the infinity mark. By infinity I mean an
object at least five miles away.
As an interim measure I treated the focus at infinity as being when the
split image in the viewfinder of my 4T was in perfect alignment even
though the lens barrel had perhaps another millimeter to rotate before
it would rotate no further.
Can anyone advise me as to whether the lens should be serviced to have
infinity set to infinity or whether what I have experienced today is
normal behaviour for this lens.
John Hudson
Vancouver, BC
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