Mitutoyo 378-835-7 BD Plan Apo 50X Objective for bright/dark-field observation in visible range

The BD Plan Apo 50X is a precision plan apochromat objective designed for both bright field and dark field inspection. It is ideally suited for detecting scratches, concavity, convexity, and fine surface irregularities, providing high contrast and detailed imaging for precision surface analysis.

With an infinity-corrected optical design and correction across the visible wavelength range (436–656 nm), the BD Plan Apo 50X delivers sharp, flat-field imaging in both bright and dark field modes. Its 13 mm working distance offers practical clearance while maintaining strong optical performance.

Featuring a numerical aperture of 0.55 and a resolving power of 0.5 µm, this objective provides excellent detail at mid-to-high magnification levels. Designed for compatibility with MF-U and Hyper MF-U microscope systems, it is a reliable choice for industrial and laboratory inspection applications.

Key Features

Suitable for Bright Field and Dark Field inspection

Ideal for detecting scratches, concavity, convexity, and fine surface defects

High-quality Plan Apochromat optical design

Infinity corrected

Long working distance design

Optimised for visible wavelength range (436–656 nm)

Specifications

Model: BD Plan Apo 50X

Magnification: 50x

Working distance (in air): 13 mm

Numerical Aperture (N.A.): 0.55

Corrected wavelength range: 436–656 nm

Resolving power: 0.5 µm

Depth of field: 0.9 µm

Field of view (ø24 mm eyepiece): ø0.48 mm

Field of view (1/2” camera chip): 0.1 × 0.13 mm

Spectral range: VIS

Observation mode: Brightfield / Darkfield

Glass compensation: No

Laser applications: No

Mass: 440 g