----- Original Message -----
From: "Thomas Bantel" <[EMAIL PROTECTED]>
> > Though not a great believer of lens tests myself, it is interesting to
note
> > a lens test of macro lenses in this month's (April) of Practical
Photography
> > (British mag) that tested the MTF's of allmost all brand names. The
Sigma
> > and Tamron (and Minolta 100mm) got the same final score as the Canon
(9/10)
> > which could be related to the respective price of the 3 but the Canon is
> > mostly sharper than the the other two. The Tamron and Sigma seems to
perform
> > on par with the Canon in the centre MTF, but loses out at the edges.
> > (Actually, at f2.8, the Sigma and Tamron both performs slightly better
than
> > the Canon in the centre but worse at the edges)
> > The big disappointment from a Canon perspective from this article is how
> > badly the 50mm/f2.5 fared in edge resolution wide open against the
others.
> > Other 'losers' include the Nikon 105, Pentax 100 and other 100's like
> > Cosina, Vivitar, Soligor and Tokina.
>
> Just for clarification: At what magnification did they test? I guess macro
> range ?!
Thomas
Lenses were set at infinity. I guess that doesn't say much about the macro
ability then does it?
It does prove that the Sigma and Tamron are very good alternatives for those
who can't afford the Canon.
BTW, All MTF tests I've seen so far are tested at infinity. I wonder why?
Regards
Thys
---------------------------------------------------------
Thys van der Merwe
Portfolio of African Images:
http://home.mweb.co.za/te/teknovis
-----------------------------------------------------------
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
