Tamron 90 macro 52b Under expose KX, 100D OK !
I have a peculiar problem, using a Tamron 90mm 2.5 with a PK/A adapter
on my KX it will WAY underexpose on bright subjects to the point that the
pics are almost black. The exposure and speeds are always correct.
The same setup moved to the 100D does not give this problem at all, even though
the exposure settings show the same as the KX.
Have tried with 3 different PK/A mounts with the same results, the camera with
any of 6 other Tamron lenses does not give this problem !
Sometimes the first pic is good then the following ones are not, it seems to be that the
KX has a mechanical problem with this lens. Does it with or without the 2X extension.
In full manual though there is never a problem ?
I have stripped the lens and checked all of the mechanics and all is excellent.
Any Ideas ?
Thank You
Bob
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