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Re: [OM] Tradeoff - prime vs prime + TC

Subject: Re: [OM] Tradeoff - prime vs prime + TC
From: "John A. Prosper" <prosper@xxxxxxxxxxxxxxxxx>
Date: Thu, 18 Mar 1999 17:02:27 -0500 (EST)
On Wed, 17 Mar 1999, Barry B. Bean wrote:

|What would you expect to give up shooting a 50/1.4 with a 2x
|teleconvertor compared to shooting with a 100/2.8?

You lose some sharpness due to a drop in contrast.  The TC introduces
more air-glass surfaces to the 50/1.4's own glass ensemble.  As the
number of air-glass surfaces go up, contrast declines.


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