... The heliar was the more complex lens and probably has the edge but given the higher number of air-glass interfaces may have significantly lower contrast than the skopar which is a tessar type design.
Heliars and Tessars have the same number of air/glass surfaces: Six. Just like triplets.
I have Heliars and Tessars.
The differences are subtle.
How you see makes far more
difference than the lens you
happen to be looking through.
Hmm Ole, Doesn't the skopar also have six air/glass surfaces?Though according to the Vade Mecum the Heliar is 5 lenses in three groups and the Skopar is four lenses in three groups.
Kind regards
Exactly Søren; the Skopar is a Tessar(clone). So the Heliar has an extra (cemented) element in one of the groups.
The extreme case of x-in-three is the Schneider-Göttingen Aero-Xenar 300mm f:5.5, which seems to be eight or nine elements in three groups, combinet as a kind of "super-Heliar".
D'Oh. My bad counting and thoughtless rephrasing from the vade medum. :rolleyes:Heliars and Tessars have the same number of air/glass surfaces: Six. Just like triplets.
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