Mitutoyo 378-811-15 M Plan Apo SL 50X Objectives for bright-field observation in visible range, SL Super Long working distance
SKU:Code: 378-811-15
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- brand Mitutoyo
- mass 280g
- magnification 50x
- working distance 20.5mm
- numerical aperture 0.42
- working distance 20.5mm
- focal length 4mm
- resolving power (Microns) 0.7
- focal depth (Microns) 1.6
- view field 1 mm Dia
- view field 2 0.10x0.13mm
M Plan Apo SL 50X Objective Lens (Brightfield, Extra-Long Working Distance)
The M Plan Apo SL 50X is a precision 50x metallurgical microscope objective designed for brightfield observation across the visible spectrum. With an extra-long working distance of 20.5 mm, it is ideal for inspection tasks where additional clearance is needed between the lens and the sample.
This objective is infinity corrected and optimised across a wide wavelength range (436–656 nm) for consistent optical performance. Featuring a numerical aperture of 0.42, it provides excellent detail with a resolving power of 0.7 µm, while maintaining a practical depth of field of 1.6 µm—making it well suited for routine industrial inspection and measurement applications.
Compatible with VMU / FS-70 / MF-U / Hyper MF-U microscope systems, the M Plan Apo SL 50X delivers reliable, high-quality imaging in a robust design.
Key Specifications
Magnification: 50x
Working Distance (in air): 20.5 mm (extra-long)
Numerical Aperture (N.A.): 0.42
Infinity corrected: Yes
Corrected wavelength range: 436–656 nm
Resolving power: 0.7 µm
Depth of field: 1.6 µm
Field of view (ø24 mm eyepiece): ø0.48 mm
Field of view (1/2” camera chip): 0.1 × 0.13 mm
Parfocal distance (P.D.): 95 mm
Spectral range: VIS
Observation mode: Brightfield
Glass compensation: No
Mass: 280 g