wwp@yahoogroups.com:
Re: Sigma 8mm
Rodolpho Pajuaba 2004-Nov-24 14:00:00
Gerard Kuster wrote:
> Hi Sam,
> What do you mean by 'Hyperfocal approach" ?
> Gerard
>
> Sam <#removed#> wrote:
> Hi there,
>
> Just a small observation on your shots, i think you had focusing problems during the shot... try the Hyperfocal approach, works just fine! Check out the shots at my site www.samirahmed.com, all done with Sigma 8mm.
>
> Sam
>
I?m not Sam, but I think I can help. Hyperfocal approach means simply
that when you focus on the infinity you waste a very big amount of area
in focus, principally with a 8mm lens. For instance, if you place the
focus ring at, say, 1 meter, and the aperture at f8, you?ll very likely
(I don?t have the lens, so I?m estimating) have focus since about 30cm
to infinity. You must look at those small marks on either side of the
central focus index to be sure. On my 14mm, if I put the focus ring on 1
meter, I get focus from 50cm to infinity at f8. The ideal is to put the
infinity mark of the focus ring at the f number you?ll use, and then you
can see the depth of field of the lens.
HTH,
Rodolpho Pajuaba