珍品 Leica Summitar* 5cm/2 Ltm Summicron “Prototype”

珍品 Leica Summitar* 5cm/2 Ltm Summicron “Prototype”

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Leica Summitar* 5cm/2 Ltm Summicron “Prototype”

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Glass has few haze only.

The Summitar* lenses can be considered as the first prototypes of what later turned into the Summicron design.

Back in 1950, there were produced 88 examples of the Summitar* with serial numbers 812242-812329.

The asterisk after the lens name (not after the serial number) probably indicates the presence of a radioactive element.

The general design of the optical computation was already very similar to the later Summicron.

But the LaK9 (the first thorium-oxide free Lanthanium crown glass) of the 1953 Summicron was not yet available by 1950.

Typically, the Summitar* lenses stop down to f/22, whereas Summitar as well as later Summicron stop down to f/16 only.

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