Re: Dopitic Adjustment --o o-- --o o-- --o o-- --o o-- --o o-- --o o-- --o o--
- From: John A. <john@xxxxxxxxxxxxxxx>
- Date: Wed, 24 Jun 2009 16:26:38 GMT
On Wed, 24 Jun 2009 14:23:08 +0100, "Roy G" <royphot@xxxxxxxxxx>
wrote:
"John A." <john@xxxxxxxxxxxxxxx> wrote in message
news:ab534557eoj1r668npcdohebu8h1sr2qeu@xxxxxxxxxx
On Tue, 23 Jun 2009 19:12:08 -0700 (PDT), infiniteMPG
<57classic@xxxxxxxxx> wrote:
I have a Sony A100 DSLR and just picked up a Tamron AF 90MM F/2.8 DI
that I use for macro shooting. The issue I have is that when I get
tight on stuff I dump the AF (Auto Focus) and go to manual focus to
eliminate the hunting of the focusing. When it looks crisp and clear
in the viewfinder I take the shots and it is a tad blurring in the
image. So what I am thinking is that diopter adjustment is out thru
the viewfinder and when it "looks" focused thru the viewfinder, it's
far from focused for the shot.
So my question is, how can you accurately get the diopter adjusted to
match what the image is??? I am still hanging in there with 20:20
vision but I need to get the dioptic zoned in so when it looks crisp
and clear, it actually *IS* crisp and clear.
Help????
Thanks!!!
If the AF eventually gets it after the hunting, let it do so with the
camera on a tripod, then adjust accordingly.
Your understanding of the Eyepiece dioptre setting is a little flawed.
This setting will only make your view of the focussing screen more or less
sharp. It should be set so that the VF Info and markings on the Screen are
as sharp as they can be.
If your Dioptre setting is wrong a well focussed image may not look as sharp
as it actually is.
BUT -- It can NOT make an out of focus image look sharper than it actually
is.
I understand that the tiny view through the eyepiece may not reveal
fine focus the way pixel peeping will. A not-quite-focused image may
well appear focused enough through the eyepiece.
But yes, the standard method is, of course, to focus on the info
displays, if there are any. (And I guess there are on pretty much all
cameras these days.)
.
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