[Rockhounds] achieving depth of field w digicam?

[J Bryan Kramer]

Whoops URL:

<http://www.robertseber.com/calculators/MacroDOFCalculator.html>

On Wed, Apr 16, 2008 at 8:56 PM, J Bryan Kramer <codeburner at gmail.com>
wrote:

> Here is a macro DOF calculator, use 22.5 as the sensor width for a Canon
> crop frame camera like yours. At f/45 on a 30 mm object the most DOF you
> could get is 5mm and you would suffer loss of resolution at that f/stop.
> You'd need very bright lights too. At a more reasonable f/16 you drop back
> to 1.7mm DOF.
>
> BK
>
>
> On Wed, Apr 16, 2008 at 7:59 PM, Kreigh Tomaszewski <
> Kreigh at tomaszewski.net> wrote:
>
> > Tim,
> >
> > The classic trick might work. More light and a higher f stop to get more
> > depth of field.
> >
> > Kreigh
> >
> >
> >
> > Tim Jokela Jr. wrote:
> > >
> > > This one goes out to the digital photography gurus out there.
> > >
> > > I was talking to a buddy last night about macrophotography of small
> > fossils,
> > > 1-3cm stuff, and how capturing any depth of field continues to be the
> > major
> > > challenge. He suggested three ways of doing it: buy the $25,000 camera
> > > system made to do the job, take the picture 3 meters away from the
> > specimen
> > > and blow up the image, or take multiple shots, focusing on different
> > areas,
> > > and stitch them together with Helicon, Combine-Z, or the expensive new
> > > version of PhotoShop.
> > >
> > > All are basically horrible options.
> > >
> > > So, is there anything new and interesting in the world of digital
> > > photography that's giving depth of field to macrophotography in a
> > simple,
> > > affordable manner? (My weapon of choice atm is a Canon Digital Rebel
> > with a
> > > 50mm macro lens.)
> > >
> > > Many thanks for any info!
> > >
> > > Tim Jokela Jr., tjokela at execulink.com
> > > Business: http://www.element51.com
> > > Pleasure: http://www.ontariominerals.com
> > >
> > > --
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> >
> > --
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> >
>
>
>
> --
> "Photography, as we all know, is not real at all. It is an illusion of
> reality with which we create our own private world."
> Arnold Newman
>
>
> J Bryan Kramer
> North Florida, USA
> photos at:
> http://pbase.com/photoburner
>



-- 
"Photography, as we all know, is not real at all. It is an illusion of
reality with which we create our own private world."
Arnold Newman


J Bryan Kramer
North Florida, USA
photos at:
http://pbase.com/photoburner


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