At 09:52 PM 10/14/2002 -0700, you wrote:
>--- gfen <[EMAIL PROTECTED]> wrote:
> > On Mon, 14 Oct 2002, Arnold Stark wrote:
> > > yes, now I would like to ask you to, what prime
> > lenses would you like
> > > that Pentax would have built in k-mount at some
> > time in the past
> > > (starting 1975), or that Pentax would come out
> > with now????
> >
> > I want an A50/1.0.
> >
> > Doesn't mean I'd buy it, but its what I want.
> > Weights? Filter sizes? These
> > things mean nothing to me, but damnit, I want an
> > A50/1!
>
>I want a FA 300mm f1.0, something that would be so
>monstrously huge and heavy it would need it's own car
>to move it around. Like a self-propelled gun from
>WWII. It wouldn't use screw-on filters, but the
>tinted windows of a low-rider. Multicoated, of
>course. :)
>Can you imagine the depth of field? Man, you could
>execute portraits of individual ants in a swarm! What
You couldn't there wouldn't be enough DOF
Lets look at the results:
First the assumptions: 1.) Common black ant, size 1 cm in length.
2.) Head shot 30x magnification.
So focusing distance with 300mm about 31cm.
DOF at f 1 .000172 cm
DOF at f 64 .011027 cm
(Yea, I'm being a geek again).
>every entymologist would want.
>
>
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