At 11:41 7.2.2001 +0100, you wrote:
>> Then it's time to believe... Believe that a FREE lens will offer you a far
>> - -superior quality between 1:2 and 1:1 magnification ratios than a
>> "standard" lens. I guess here we are mostly talking about corner sharpness
>> and focus-plane flatness.
>
>I WANT TO BELIEVE!
>But, the 50mm has no FREE system and it works good. So, with the 100macro
when I'm near
>1:1, I work at around 60-70mm. For better image quality you sacrifice
focal length, is
>this correct? Or better, you sacrifice it to get an all-in-one lens (good
infinity focus +
>good macro focus).
>It seems the 100mm macro is actually a 60-100mm zoom lens. :-)
>
>I was thinking about obtaining the 100mm macro, but now I am hesitating. I
actually don't
>buy a 100mm macro but a 60-70mm macro. Is this worth the money? Hmm...,
hmmm....
>Enablers, speak up please!
>
>Best wishes
> Wieland
I still think from my and others' experience that a well-made Tessar will
do the job quite well in macro. Especially the slower-aperture versions
(the original version of Tessar had 6.3 aperture AFAIK. Over time, small
changes were made as to made it as fast as 2.8, with some lost of optical
quality maybe - the slower versions are IMHO better).
So don't throw out those old macro lenses because of new FREE designs! At
_least_ they don't change focal length, like the 100mm macro does (60mm at
1:1 ... PHEW!!!) When ever do you need super-sharp corners and flattest
field at 2.8 ? And at f/8, I would think a good Tessar would do the job as
well, perhaps not AS sharp but still very sharp. Also, as a sidenote, there
were Apo-Tessars made for Largeformat, which could IMHO blow the macro FREE
lens :) (AFAIK, they were corrected for macro work. I might be wrong
though, I don't have one of those beasts - but long for one + LF camera
with it :) )
Frantisek
( feeling a bit like Pentax-bashing today :) But Tessars are really that
good! I just reexamined some 6x6cm Velvia shots at f/8 or f/11 from old,
uncoated, Tessar equiped Rolleiflex, under a 15x loupe - they were good!
Most enlarger lenses were tessars too, and lots still are!)
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