I found it interesting that according to him manual focus through the
viewfinder is not precise enough, while manual focus through live
preview on an LCD screen delivers the best results.
--
"Alfred Molon" <alfred_molon@yahoo.com> wrote in message
news:MPG.22c713fcd50868c698bcdc@news.supernews.com ...
> Here is an interesting article by Dave Etchells:
> http://www.slrgear.com/articles/focus/focus.htm
>
> I found it interesting that according to him manual focus through the
> viewfinder is not precise enough, while manual focus through live
> preview on an LCD screen delivers the best results.
> --
>
> Alfred Molon
> ------------------------------
> Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at
> http://tech.groups.yahoo.com/group/MyOlympus/
> http://myolympus.org/ photo sharing site
On Jun 21, 7:35 am, Alfred Molon <alfred_mo...@yahoo.com> wrote:
> Here is an interesting article by Dave Etchells:http://www.slrgear.com/articles/focus/focus.htm
>
> I found it interesting that according to him manual focus through the
> viewfinder is not precise enough, while manual focus through live
> preview on an LCD screen delivers the best results.
> --
>
> Alfred Molon
> ------------------------------
> Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum athttp://tech.groups.yahoo.com/group/MyOlympus/http://myolympus.org/photo sharing site
Much of what he says is true, but somewhat irrelevant to the average
photographer who does not have access to an optics lab. I used to be
a lens designer and EO system analyst. We had a lot of nice
equipment. I no longer have access to such equipment but I still
normally use manual focus.
It is easy enough to check your eyesight and its effects with
viewfinder. With the lens on infinity look through at a very distant
(many miles) high contrast object, like moon or very distant feature.
Depending on the type of focusing screen in an SLR eye defects may or
may not interact between eye and camera lens. If the viewfinder shows
any recticle marks, such as focusing squares or exposure zones, are
they sharply in focus? If so than you can get a good manual focus.
The problem I see most with autofocus is with an object with a lot of
depth. Say a railroad track running from front to back. Where along
that object should you focus. You can use rules of thumb to do manual
focus, but I doubt the computer in the camera can use such rules.
Admittedly an LCD screen is far, far from resolution needed to judge
focus.
In message <MPG.22c713fcd50868c698bcdc@news.supernews.com>, Alfred Molon
<alfred_molon@yahoo.com> writes
>Here is an interesting article by Dave Etchells:
>http://www.slrgear.com/articles/focus/focus.htm
>
>I found it interesting that according to him manual focus through the
>viewfinder is not precise enough, while manual focus through live
>preview on an LCD screen delivers the best results.
The point about testing the lens and not the camera is good.
I use the DXO RAW converter because DXO is also a lens test house and
the DXO RAW software can compensate for lenses and bodies.
They have a whole list of camera and lens modules and it automatically
loads the appropriate one(s) for each shot.
--
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills Staffs England /\/\/\/\/
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
Alfred Molon wrote:
> Here is an interesting article by Dave Etchells:
> http://www.slrgear.com/articles/focus/focus.htm
>
> I found it interesting that according to him manual focus through the
> viewfinder is not precise enough, while manual focus through live
> preview on an LCD screen delivers the best results.
Matt Ion wrote:
> Alfred Molon wrote:
>> Here is an interesting article by Dave Etchells:
>> http://www.slrgear.com/articles/focus/focus.htm
>>
>> I found it interesting that according to him manual focus through the
>> viewfinder is not precise enough, while manual focus through live
>> preview on an LCD screen delivers the best results.
>
> However did I survive with my old Minolta X-700??
As with any tool, by gaining experience in how best to use it. And
stopping down a little probably helped..... <G>
Alfred Molon wrote:
> Here is an interesting article by Dave Etchells:
> http://www.slrgear.com/articles/focus/focus.htm
>
> I found it interesting that according to him manual focus through the
> viewfinder is not precise enough, while manual focus through live
> preview on an LCD screen delivers the best results.
Live view (on a D300, only one I've fiddled with) is not full
magnification. Post-view on the LCD of a D200 is as good as a computer
monitor (not true for the D70), but of course that takes trial & error.
Also they admit not attempting manual focus with a split prism
viewfinder focusing aid. Anyways yes, live view is the most accurate for
studio conditions but awkward for hand held shooting.
Alfred Molon wrote:
> In article <122465f9-3e52-4411-b3d6-4f240fe66274
> @x35g2000hsb.googlegroups.com>, Don Stauffer in Minnesota says...
>
>> Admittedly an LCD screen is far, far from resolution needed to judge
>> focus.
>
> But you can zoom down to pixel level and precisely adjust focus.
Not quite that close. From what I've seen the D300 zooms closer after
taking the shot than in live view.
Focus Fallibility: Lens Test Fallacies 
Linear Mode
