From the most
common to the most rare…
Modern eyepieces (after about end of ‘60)
Between modern eyepieces Carl Zeiss Jena and Carl
Zeiss ones are probably the most valued ones, considered having very good
optical performances especially in the planetary field. Only few other
eyepieces series like TMB Mono, AP SPL, Nikon Nav and few others are considered
at the same premium level – and reach similar prices on the market.
Carl Zeiss ZAO I and ZAO II are sold today at more
than 2.000 Euros for the complete set (of 4 eyepieces only – around 500 Euros
each), and the sorter focal lengths of CZJ Orthos are sold at more (sometimes
many more) than 300 Euros each.
Carl Zeiss Jena modern series
Carl Zeiss Jena eyepieces of the most recent series
are characterized in general by a brass or aluminum barrel, and a black
straight top with a ring made by Bakelite.
Most recent CZJ eyepieces are the ones with aluminum
barrel, and can be easily recognized because they are lighter than the brass
ones, and for a writing that on the longer focal lengths (from 10-O onwards) is
on the black part of the eyepiece’s body with a letter (indicating optical
design, ie. “O” for Orthoscopic, “H” for Huygens and “M” for Monocentric), and
a number, indicating focal length. Normally the writing is oriented vertically,
and in the Alu ones is quite big (see pictures). Shorter focal lengths (4-O,
6-O and 8-O) have writings on the top of black eyepiece’s body, and in Alu
versions is with a larger lettering that in the Brass ones.