Hi Nick,

I think that a prime does transmit more light than a zoom as it has a
simpler lens construction with less glass elements to reflect light.  Having
said that, the coatings on the glass are designed to minimise reflection
(and maximise transmission) so the difference should be minimal.  In any
case TTL metering would compensate automatically.

Regards
Nenad

----- Original Message -----
From: Nicholas Wright <[EMAIL PROTECTED]>
To: PDML <[EMAIL PROTECTED]>
Sent: Monday, September 24, 2001 1:00 PM
Subject: lens brightness


> I have heard remarks that a 200/2.8 prime will transmit more light than an
> 80-200/2.8 zoom. Is this true? I thought a 200/2.8 was a 200/2.8 whether
it
> be a prime or part of a zoom. Thanks for any help.
>
> Nick
> -
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