Hi Gary
Can you enlighten me on what you mean by "high SQT grade open?"
Thanks
Titoy
-----Original Message-----
From: Gary Reese <pcacala@xxxxxxxxxxxxx>
To: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
Date: Monday, January 08, 2001 1:54 AM
Subject: Re: [OM] Fast lenses, slow photographers and other opinion
>Keith writes:
>
><< It counters the notion that you need a wide aperture for easy focus
>though. >>
>
>IMHO, ease of focus is a combination of:
>1. an aperture that gives shallow depth of field
>2. a viewfinder with the correct dioptric correction for your eye
>3. a lens with a high SQF grade wide open
>4. a high tech (Acutte Matte, 2 series, what-ever you want to name it)
>focusing screen suitable for the lens in use
>5. a contrasty subject with fine detail (for matte screens) or straight
>lines (for split-image biprism screens).
>
>When all 5 are in play, life is grand.
>
>Gary Reese
>Las Vegas, NV
>
>
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