The large range of closely staggered focal lengths
for this series guarantees the most suitable lens for
the angle of view and the image circle diameter for all
the current sensor sizes. Their apochromatic correction
reduces color fringing which has more significance
for digital than for conventional photography
on film because of the pixel structure and interpolation
that both enhance existing color fringes.
meticulous flattening of the field curvature of this
range of lenses does justice to the advantage of the
perfectly plane sensor surface.
distance ranges from infinity up to an image scale of
1:3. Sharpness is still fine even at higher scales but
you will probably find the Macro Apo-Digitars to be slightly superior.