Archived posting to the Leica Users Group, 1996/07/30

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To: "Leica Users Group" <leica-users@mejac.palo-alto.ca.us>, <kabir@hsmpk14a-103.Eng.Sun.COM>
Subject: Re: in and out of focus
From: Godfrey DiGiorgi <ramarren@apple.com>
Date: Tue, 30 Jul 96 07:08:05 -0700

>Can you really focus the Leica faster than a MF SLR in a dynamic
>situation (subject, camera, or both moving) ?
>
>If you know how to do this, is there a trick or two that you use
>that you might want to share? 
>
>Any ideas on how to focus quickly in bright light, where it becomes
>even harder to discern the rangefinder spot?

Focusing speed is fairly difficult to quantify. It depends upon
the camera and lens, focusing mechanism and the user. I find the 
Leica M very easy to focus, either bright sun or dim light, 
particularly with the 28 or 50 lenses, a little slower with the
90. Mind you, I didn't say fast, but easy. 

As long as I'm using a 50-135mm lens, I'd say my SLR is faster
and easier to follow focus in dynamic situations. With
short lenses, it's not as easy to see the focus point accurately.
Long lenses always take a bit more effort to focus precisely for 
me. And the SLR is more dependent upon good light for really 
accurate focus.

With either type of camera, when I'm working with dynamic 
subjects and short lenses, I usually just use the focusing 
scale and DOF to cover my focusing needs. In these situations,
getting the shot is more important than absolute focus 
accuracy to me. 

Framing is another matter. Again, with the wider lenses, the M
is easier to frame with than the SLR, but as the lens length 
goes up, the SLR takes the upper hand simply because the image 
fills my field of view better. Overall, the SLR is more 
precise in framing, a rangefinder or scale focus camera's 
framing idiom is always more of an approximation.

For certain subjects, like the 4 year old running towards you, 
a fast autofocus camera or prefocus is the best option. Trying
to follow focus on such subjects is always difficult.

This is why there are many different types of cameras in the 
world. Each has its advantages and disadvantages in certain
situations.

Godfrey