Hi, again!
Your test below is completely correct,
I agree,
but it is not the case I meant.
Please simply follow that:
1. take the lens and put it on
a camera,
2. open it fully and direct it on the plain wall
(you are looking through 3,5 hole),
3. close the diaphragm one stop - THEN
the viewfinder comes dimmer (you are looking
through 4,5 hole),
4. close the diaphragm next stop - THEN
the viewfinder stays dimm like it has been so far
(you are still looking through 4,5 hole),
It means that the lens is difficult for focussing
because the diaphragm closes from 3,5 to 4,5
immediately at the moment when you are turning
the diaphragm ring from 3,5 THAT's the real disadvantage
at the manual cameras.
Regards,
Zbigniew
Poland
-------------------------------------------------------------------------
> Don't understand what you mean, I think Olympus will not quote something
> that is so far away from true. I just test my Zuiko 35-105 with the
> following setting:
>
> - TTL flash
> - focus on plain wall
> - wide open
> - adjust the ISO to make the reading at 35mm end read f2.8 +0.4 stops
> - then I zoom it to 105 and it gives 2.8 +0.9 stops.
>
> It indicated the different is 0.5 stops, quite close the Olympus's quote.
>
> To further check the aperture different between 35 and 105mm at F8
>
> - Same as above, set the lens to F8.
> - adjust the ISO to make the reading at 105mm at F5.6 +0.9
> - zoom to 35mm and read again, the reading is F8
>
> It indicated the different is 0.1 stop, quite accurate compensation!
>
> Hope it is more clear now.
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Globtroter" <zbturon@xxxxxxxxxxxxx>
>
> > Hi, Chris and All!
> > I've been having the lens 35-105 for some time.
> > A wonderful lens anyway, but has this one
> > disadvantage - it is not really 3,5-4,5, it is simply
> > and only 4,5 dimm.
> > So, you didn't buy a lemon,
> > you bought such a lens with such a discomfort.
> >
> > Regards,
> > Zbigniew
> >
>
>
>
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