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[OM] Re: Anyone Have an ED12-60/2.8-4?

Subject: [OM] Re: Anyone Have an ED12-60/2.8-4?
From: John Hudson <OM4T@xxxxxxxxxxx>
Date: Fri, 11 Jan 2008 23:07:03 -0400
Dan:

All this talk about computer assisted focusing makes the simplicity of 
focusing an M3 or an OM4T feel like a return to the uncomplicated pleasures 
of yesteryear :-)

Beam me up some digital to either one of those yesteryear bodies Scottie !

jh

 ----- Original Message ----- 
From: "Dan Mitchell" <danmitchell@xxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Friday, January 11, 2008 9:33 PM
Subject: [OM] Re: Anyone Have an ED12-60/2.8-4?


>
>> If not, is the auto focus precision of the 12-60, or any other Olympus
>> digital lens, a function of the mechical / electronic interaction of the
>> lens itself in combination with the camera body upon which it is mounted?
>> How can any software downloaded on one's computer upgrade the auto focus
>> capability of on's camera and lens?
>>
>> For any new software to be effective would it not have to be downloaded 
>> into
>> the camera itself?
>
>  Depends on how the lens works. If the camera sends the lens a signal
> saying "focus yourself at X feet", then it's entirely up to the lens how
> it translates that signal into motion of the motors inside itself -- 
> maybe it has improved knowledge of the amount of torque required to
> reposition its elements to focus at X away, so it can accelerate faster
> or something?
>
>  Theoretically you could time things so that based on how long it takes
> the lens to stop itself down, it could start stopping down before it's
> focussed, so that as long as the stop-down and focus happen at the same
> instant, you reduce shutter lag. That sort of thing.
>
>  On the other hand, if the lens is dumb and just knows "focus further"
> -vs- "focus nearer", then it's harder to see what a firmware upgrade
> could do.
>
>  -- dan
>
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