wwp@yahoogroups.com:
Re: Sigma 8mm
Hans Nyberg 2004-Nov-24 14:20:00
On Nov 24, 2004, at 3:00 PM, Rodolpho Pajuaba wrote:
> 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.
It does not matter very much on the SIGMA 8mm.
Even if you leave the focus at infinity you get depth of field from
0.8m to infinity at full aperture.
Thats not the problem with the Sigma and sharpnes.
The important is to treat the images right.
Use Raw files and remember to not underexpose to much or use noise
creating ASA settings as you have to push the edges about 1 aperture
more.
Also remove chromatic abberation.
Hans
Hans Nyberg
commercial photographer
hans nyberg fotografi
hasselvej 6 DK-8550 ryomgaard denmark
<http://www.hans-nyberg.dk>
<http://www.qtvr.dk>
<http://www.panoramas.dk> Panoramas.dk - Features Fullscreen QTVR
email: #removed#