Archived posting to the Leica Users Group, 1997/07/12
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Pascal wrote:
> There is an extensive article on the new Summicron-M 35mm f/2.0 ASPH in
> Leica Fotografie International (nr. 5/97). I got the German edition a w=
eek
> ago. The article is written by S=F6nke Peters, product manager in Solms=
for
> the Leica-M system.
>=20
> It also contains a brief comparison with the Summilux-M 35 mm f/1.4 ASP=
H.
> Here are the main remarks (translated from German):
>=20
> 1=B0 the construction of both lenses is similar, e.g. the front and bac=
k lens
> elements that are inwardly curved (in total 7 elements for the Summicro=
n, 9
> elements for the Summilux).
> 2=B0 Contrast is on the same high level for both lenses at full apertur=
e (of
> course, the Summilux already obtains this result at its maximum apertur=
e of
> 1.4, the Summicron at 2.0).
> 3=B0 Contrast is slightly higher for the Summilux than for the Summicro=
n when
> stopped down at 2.0 (the maximum aperture of the Summicron).
> 4=B0 Light fall-off ("Vignettierung") at maximum aperture could be
> considerably enhanced for the new Summicron, coppared with its predeces=
sor,
> and can be compared with the Summilux at f/2.0. There is no more artifi=
cial
> light fall-off when stopped down to f/4.0.
> 5=B0 The high optical performance of the new Summicron stays at the sam=
e
> level when used at the minimum focussing distance of 70 cm.
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> Hope this helps.
>=20
> Pascal
> Belgium
>=20
Pascal,
Many thanks,
DWA