Simon Worby wrote:
> Are you sure it's the blades. Out of about 1/2 dozen "slow"
> aperture lenses I've had through my paws, only 1 had oily blades.
> The others just had oily rings.
>
> As I say, are you sure it's the blades?
If I set the aperture to 16 and stop down using
the lens stop-down button, the edges of the
blades show a "wet" rim, just like some oil or
whatever the stuff is.
Stopping down is reasonably fast, but the lens
does not open again, or only reluctantly, or
when I turn the aperture ring to full open.
> Fixing oily rings on a 50/1.8 (and various other small lenses)
> takes about 20 minutes and is an absolute doddle. I've never had
> to fix the blades, and I understand it's not economic on a 50/1.8.
I know it is not economic, since 1.8/50s
averages at 19 EURO at that bay place here
in Germany, with a standard derivation of
9 EURO and a recorded low for a "good" one
of 10 EURO (135 sales of 1.8/50).
I just never took a lens apart, and now ask
if that is something funny to do or better
not to do, because ... (21, 100, flash).
I should start from the back, should I?
Andreas
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