In addition to what Rob says below, there's a lot more to like about the 77
than just resolution. It has the lowest linear distortion of any lens I've
yet owned. That means a lot to some people (like me).
Thanks,
Ed
----- Original Message -----
From: "Rob Studdert" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, January 06, 2001 12:43 AM
Subject: Re: 77 Ltd ratings
> On 5 Jan 2001, at 22:34, Jim & Jackie Meeks wrote:
>
> > I was looking at Yoshihiko's lens ratings site and was noticing how low
a lines
> > per mm rating the 77 and other telephoto lenses fared, especially when
compared
> > to some of the wide and normal lenses. I've heard several people on the
PDML
> > rave how sharp some of these lenses are and it would seem to follow that
they
> > would have a higher resolving power. Would anyone care to explain?
Thanks. Jim
> > Meeks
>
> Hi Jim,
>
> Sharpness is not an absolute measure but a perception, ie if the image
from
> a lens displays a very smooth and uniform out of focus area then the
> apparent sharpness of the in focus area may be greater than an image from
> a lens which has a measurably higher resolution but causes distraction and
> confusion in image background. So resolving power isn't directly related
to
> resolving power but more so to the overall optical thumb-print
(combination of
> all the commonly measured and non-measured optical parameters) of the
> lens.
>
> Written in haste :-)
>
> Cheers,
>
> Rob Studdert
> HURSTVILLE AUSTRALIA
> Tel +61-2-9554-4110
> Fax +61-2-9554-9259
> UTC(GMT) +10 Hours
> [EMAIL PROTECTED]
> http://www.ozemail.com.au/~distudio/publications.html
>
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>
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