Archived posting to the Leica Users Group, 1998/02/25

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Subject: Re: [Leica] Re: Contax 45 G lens
From: Five Senses Productions <fls@5senses.com>
Date: Wed, 25 Feb 1998 18:14:23 -0800

Do you have detailed reports of your testing of the Planar versus the
Summicrons?  I would love to see some details on what differences
you actually found........

At 08:55 PM 3/9/98 +0100, you wrote:
> These I
>>compared side by side on the light box, under a 4x and 8x loupe.
>>Practically identical.....same color saturation, same sharpness, same
>>fine details.....I think if I mixed them up in the same box I could not
>>tell them
>>apart.
>>
>
>This comparison might be usefull for practical shooting. It has been stated
>before and I will repeat it here: A 4x and 8x loupe in combination with a
>'chrome of whatever make or speed is a quite weak platform to base
>conclusions upon, regarding optical performance. As a recent posting
>mentioned: it is not always important to look for the ultimate or even for
>noticeable differences. But not important does not mean that differences do
>not exist or that quite an effort is needed to note and evalute the
>differences. My own testing (granted sometimes a bit on the strict side)
>shows that differences between the Planar 45 and the Summicron R and M are
>only visible when enlargements exceed the 12 to 15 times.
>
>If I were to ride two sportscars and noticed that at 50miles both had a
>good roadholding, sufficient for my driving style, can I then conclude that
>in more exacting circomstances these inferences still make sense?
>
>Erwin
> 


Francesco Sanfilippo,
Five Senses Productions
webmaster@5senses.com


http://www.5senses.com/