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Re: [OM] FYI - all the 35 mm lenses tested by photodo, in order by Grade

Subject: Re: [OM] FYI - all the 35 mm lenses tested by photodo, in order by Grade (m
From: Larry <Halpert@xxxxxxxxxxx>
Date: Sun, 16 Dec 2001 23:49:08 -0500
Not useless. All testing available right now to look at has its flaws, whether 
it be
human innacuracy in focusing on a map, or whatever Norman Goldberg/Herman 
Keppler
did.

Larry

"C.H.Ling" wrote:

> The list is useless because it only containing the photodo's
> "weighted" number not because it ignored the "technique and
> photographer", no lens test will include these items.
>
> Photodo's result was discussed here for a few times, MTF curve is
> useful if you know how to interpret them. But photodo's test has lots
> of deficiency, just try to name a few here:
>
> 1. Photodo only test the lens at infinity.
> 2. Seems they only focus once for checking the whole frame, high field
> curvature lens will have very low edges performance in the test but on
> the field it could be fine in most cases as most our objects are 3D
> not flat.
> 3. IMO, the poor weighting method only show how the lens perform with
> small prints.
> 4. MTF doesn't cover the lens color accuracy and saturation
> characteristic.
> 5. Only one sample is tested.
>
> To judge a lens performance is difficult, I'm sure there are lots of
> other points I have left. MTF is not everything not to mention
> Photodo.
>
> C.H.Ling
>
> Alan wrote:
> >
> > ax 5)
> >
> > Of course this list is useless. Ignoring the fact that it only covers 
> > infinity
> > (how many of your macro shots are at infinity???), it also ignores a large
> > number of other factors that impact image quality (ignoring technique and
> > photographer).
> >
> > Alan
>
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