Frank,
I just did my own similar test, though not as professionally, on my Oly
E-510 and Zuiko 14-54 lens. With the lens at 54mm, hand-held at 1/180 at
f/3.5, ISO 400, kitchen lights, I focused on the word "Ascend" in the
newspaper caption. The sharpest focus appears to be near the top of the
paragraph above the caption, indicating a back focus of about 38-40mm. I
made several shots, with this being the better one, but all indicated a
similar back focus.
The focus dot was on each time I made a photo. While this error is not of
much consequence, it was interesting that it consistantly occurred.
http://gallery.leica-users.org/v/OldNick/Focus+Test.tif.html
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Frank van Lindert" <Frank@xxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Sunday, December 21, 2008 10:45 AM
Subject: Re: [OM] 420 deal
> This is one of my tests, reproduced today.
> http://home.tiscali.nl/vanlindert/Calibration_E-400/test_diepte/test_diepte1.JPG
> I focused on the line indicated by the blue marker.
>
> Frank.
>
> Sun, 21 Dec 2008 17:22:04 +0100, Frank van Lindert
> <Frank@xxxxxxxxxxxxx> wrote:
>
>>I first had a setup like yours, taking pictures along a ruler. And
>>yes, it was all macro with the 14-42/3.5-4.6 standard zoom lens which
>>was part of the E-400 kit.
>>
>>Later I have learned that it was better to photograph plain newspaper
>>print from an angle which is about twenty degrees from horizontal. It
>>will give you a better feeling of the depth of field, which was my
>>primary concern when testing different lenses and macro converters.
>>
>>BTW, my favorite macro converter is a lens which I unscrewed from an
>>Olympus slide copier (intended for copying slides or negatives to
>>digital). Its thread being 58mm it screws right onto my 14-42. Its
>>focal length is about 10cm.
>>
>>Frank.
> --
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