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[OM] mirror lenses users please check in......puzzling

Subject: [OM] mirror lenses users please check in......puzzling
From: Pandionhalietius@xxxxxxx
Date: Fri, 16 Mar 2001 19:39:54 EST
Here is what I found in the archives in photo.net

"A major exception to the above occurs with mirror lenses, which have a 
significant amount of light blocked by the secondary mirror they have in 
front. It is rare to find, nowadays, anyone who uses both a handheld meter 
and a mirror lens. Those who do know enough to take the transmission losses 
into account. "

-- Hector Javkin, July 14, 1999; 09:34 P.M. Eastern 

Yikes-What is the definative answer here?
Do you guys out there shooting with mirrors have dim viewfinders greater than 
the f- stop should be?

John Raymond
Olympia, WA

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