That's the only way I can look at it as the depth of field is huge compared
to what we are familiar with in 35, even wide open. Even at 36mm
(equivalent 140mm) and wide open Mr. Ling doesn't get near the focus fall
off he is accustomed to in 35. I'd be interested in an in-depth explanation
too.
John Hermanson
___________________________________
http://www.zuiko.com
Camtech, Olympus Service since 1977.
21 South Lane, Huntington NY 11743-4714
Phone/fax 631-424-2121
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___________________________________
----- Original Message -----
From: "Mickey Trageser" <mickeytr@xxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, November 08, 2001 11:39 AM
Subject: Re: [OM] PICS
| John,
| The 9mm is only superwide in respect to the 35mm format. The design of the
| lens in respect to the target frame should bring the depth of focus back
in
| perspective. If what you say is true, medium format wide angle lenses
would
| be unable to get the depth of focus equivilent to that on 35mm with
| equivilent coverage. True? I know we have some folks very knowledgable
about
| lens design. Perhaps they can expound on this?
| Mickey
|
| On Thursday 08 November 2001 09:25 am, you wrote:
| > Since the ccd is so small compared to film (The diagonal measurement of
the
| > 35mm frame being 48mm, normal lens is 50mm), the "normal" lens for your
| > average digital may be as short as 9mm. This is the equivalent of a
super
| > wide angle which has lots of depth of field. So even if you shoot wide
| > open, it is difficult to throw things in the background out of focus
| > because depth of field is still very deep.
| >
| > John Hermanson
| > ___________________________________
| > http://www.zuiko.com
| > Camtech, Olympus Service since 1977.
| > 21 South Lane, Huntington NY 11743-4714
| > Phone/fax 631-424-2121
| > Free Olympus Manuals: 1-800-221-3000
| > ___________________________________
| > ----- Original Message -----
| > From: "C.H.Ling" <chling@xxxxxxxxxx>
| > To: <olympus@xxxxxxxxxxxxxxx>
| > Sent: Thursday, November 08, 2001 12:46 AM
| > Subject: Re: [OM] PICS
| >
| > | I wonder how a 36mm lens (the longest focal length in E-10/20) can
| > | give you a soft background for portraits or other similar. Take some
| > | shots and check it out yourself.
| > |
| > | C.H.Ling
| > |
| > | Tom Scales wrote:
| > | > What do you mean lack of control in out of focus effect. I switched
to
| > | > Aperture preferred today and was able to control my depth of field
| >
| > pretty
| >
| > | > accurately.
| > | >
| > | > Tom
| > | >
| > | > > E10 has a 2/3" small CCD and 4040 has 1/1.8" CCD (even smaller). I
| > | > > like the picture quality of of E10 but hate the lack of control in
| > | > > out of focus effect.
| > | > >
| > | > > C.H.Ling
| > | >
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| > |
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| >
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