How would you rate a Zuiko converter compared to aftermarket converters in
quality and loss of light?
Bryan Pilati
OM-2N
Va-USA
Disclaimer: I'm always joking
unless I should be serious.
----- Original Message -----
From: "Roger Wesson" <roger@xxxxxxxxxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Sunday, May 19, 2002 8:57 AM
Subject: Re: [OM] Teleconverter Theory
> If all else was equal the 5 element would be a little bit brighter but
> not enough to notice. Say each element transmits 980f the light
> passing through. Then the fraction of light making it right through to
> the back is 0.98 raised to the power of the number of elements: 0.87 for
> 7 elements and 0.90 for 5 elements. So the 5 element only lets in 4%
> more light than the 7 element - definitely too small to be noticable in
> the viewfinder.
>
> Roger
>
> > Here lies my confusion. I have a 5 element and a 7 element doubler. When
> > taking the same picture with each doubler, I would expect the 5 element
to
> > be a bit brighter (less glass?). Yet they are pretty much the same to my
> > eye.
> >
> > Thanks.
> >
> > John Cwiklinski
> >
>
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>
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