Re: [Leica] Depth of field summary with regard to the argument at hand

[John Collier <jbcollier@home.com>]

I can only agree that, as the circles of confusion get larger, definition of
the fine details goes first....and?

John Collier

> From: "Austin Franklin" <austin@darkroom.com>
> 
>> The problem of being unable to see small characters on the
>> eye chart is not
>> a matter of focus, assuming your vision is good, but of the
>> eye being unable
>> to resolve the small characters. If the eye was not focused
>> on the chart,
>> then you would have trouble seeing the large characters as well.
> 
> Even if you take your camera, and de-focus it on a newspaper just enough so
> you can discern the larger letters, and not the smaller ones, you still have
> the same focus, it's just the size of the object, in this case, the letters,
> that is different...same plane of focus.  Technically, it's a resolution
> issue.
> 
>> I am not sure I can correctly follow your example of the
>> tree. It seems that
>> you are photographing the tree from different angles.
> 
> One tree, one angle...up.
> 
>> Please elaborate
>> if I have misunderstood your example.
> 
> You have.  I think the defocused newspaper will suffice as an example.  I
> would suggest the use an SLR not an M for that example ;-)
> 
> 
>