today I did some field testing with the Double Anastigmats.
all three, Isconar, Helioplan and Unofokal are unsymmetric, although the look quite symmetric. f135mm of the whole lens, the front anastigmats alone give about 270mm, the rear parts about 200 mm.
So, they are not ideal for macro? But the performance of my Xenar ist very good at 1:1 anyway...
does anyone know if a heliar has good macro abilities?
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