Archived posting to the Leica Users Group, 2000/07/16

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Subject: Re: [Leica] optical excellence and the human error factor
From: "Marthe.Rene" <marthe.rene@sympatico.ca>
Date: Mon, 17 Jul 2000 00:12:11 -0400
References: <01BFEF7E.D91234B0@user-2ive16r.dialup.mindspring.com>

Well if you can handhold a camera at 1 to 4 sec exposure time manual or
autofocus you are a better photographer than I.

W.R.T. to EV being used for Autofocus detection capability they are and I
quote from the owner's manual.

F5 - "Autofocus detection range EV-1 to +19"
        " Metering range EV0 to 20 in 3D colour Matrix, EV2 to 20 in spot"

EOS 1V " AF working range EV0 to 18"
               " Metering range EV0-20 for all metering  modes"

As I've said, I use both autofocus and manual focus cameras. You believe
manual focus is better, fine. I tend to look at focus as just a feature of a
camera no more no less and I actually enjoy both.
Cheers

Rene

- ----- Original Message -----
From: "Austin Franklin" <austin@darkroom.com>
To: <leica-users@mejac.palo-alto.ca.us>
Sent: Sunday, July 16, 2000 11:23 PM
Subject: RE: [Leica] optical excellence and the human error factor


> > Autofocus or manual focus would give you camera shake handheld at those
> > speeds.
>
> How's that?  When you manually focus, you are long done focusing prior to
> pressing the shutter button.  Also, manual focus uses no drive motor that
> has some backlash that will cause a minimal jerking motion that is just
not
> generated by manual focus.
>
> > The point was that today's autofocus are certainly capable of more than
> 1/4
> > sec at f1.4. The EOS is capable of EV0 and the F5 of EV-1.
>
> Not necessarily.  There are many different types of autofocus systems, and
> each one has its shortcomings.  Some cameras even use more than one!  If
> the circumstances are not right, the autofocus just won't work right.  I
do
> not believe the EV is directly related to the ability of the autofocus
> system, just the exposure system.
>
>

Replies: Reply from "CIS" <s_lamb@compuserve.com> (Re: [Leica] optical excellence and the human error factor)
In reply to: Message from Austin Franklin <austin@darkroom.com> (RE: [Leica] optical excellence and the human error factor)