Leica M205 FA Different Types of Objectives, Achromatic objectives, Planachromatic objective 1×

The Different Types of Objectives

To meet the various requirements regarding imaging properties, there is a choice of high- quality interchangeable planachromatic and planapochromatic objectives and also lower- priced interchangeable achromatic objectives.

ρρ Achromatic objectives are particularly suited for specimens with high-contrast structures.

ρρ Flat-field (planachromatic) objectives are particularly well suited for studying flat objects such as wafers and thin sections.

ρρ With planapochromatic objectives, the finest structures are visible with high contrast. The sophisticated apochromatic correction allows these objectives to attain the highest color brilliance and fidelity.

Achromatic objectives

The 0.32×, 0.5×, 0.63×, 0.8×, 1×, 1.5×, 2× achromatic objectives offer countless variants for selecting the object field diameter, magni- fication ranges and working distances (see Page 147).

Planachromatic objective 1×

For the highest requirements for overall image quality, we recommend equipping the micro- scope with the 1× plan (flat-field) objective, which returns sharp, contrast-rich object fields.

Achromatic objectives with a long focal length

For special applications, achromatic objectives with long working distances and focal lengths of f=100 mm to 400 mm are available.

Leica M-series User Manual 88