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nobody

01 Oct 2014 00:57



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Dintr-o carte de design optic:
The Cooke triplet is the most basic form of an anastigmat
lens. Strictly speaking, the term anastigmat means &#8220;free
of astigmatism;&#8221; however, it is also used to describe
optical systems with reduced astigmatism and relatively
flat fields. In these designs, the field is flattened by
separating positive and negative power along the optical
axis (between surfaces, elements, or even multi-element
groups of components).

Nici eu nu cred ca are legatura cu termenul de "anastigmat" de la obiectivele foto.
Mai degraba este vorba de un design clasic + "exotic glass" (aka ED).
Adica ceva "semi-apo".

