Archived posting to the Leica Users Group, 2003/05/07

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Subject: Re: [Leica] Wow, dig that crazy 90/AA!
From: Jerry Lehrer <jerryleh@pacbell.net>
Date: Wed, 07 May 2003 09:06:52 -0700
References: <5.1.0.14.2.20030506165117.009f4ec0@pop.2alpha.net> <002301c3148a$4f14a020$6401a8c0@oemcomputer>

Don

In this regard, I wish that someone could explain why and HOW
different lenses with the same aperture and focal length can produce
different depths of focus.  How can the laws of optics be ignored?

Get as technical as you need to.  I can handle it, but don't resort to
mysticism, please.

Jerry

Don Dory wrote:

> Peter,
> On the web images posted, the 90AA is clearly the better lens, even with the
> uneven sharpness.  The question that must be answered is, Would you prefer
> almost even almost sharp, or biting sharp with falloff?  This is not a
> rhetorical question as it will change how you shoot images.
>
> I suspect that you will love the 90AA when there is a soloist or a lead
> performer as you can really isolate that person.  But that in group shots
> you will stop down and learn to wait for that moment when everyone is still.
>
> Thank you for posting the images.  Now you understand the raging debates
> about lenses here, each one has a signature that can be artistically
> interesting.
>
> Don
> doyrsrus@mindspring.com
>
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Replies: Reply from "Don Dory" <dorysrus@mindspring.com> (Re: [Leica] Wow, dig that crazy 90/AA!)
In reply to: Message from Peter Klein <pklein@2alpha.net> ([Leica] Wow, dig that crazy 90/AA!)
Message from "Don Dory" <dorysrus@mindspring.com> (Re: [Leica] Wow, dig that crazy 90/AA!)