MAGUS 20PL Plan 20х/0.40 ∞/0.17 Objective

The resolution limit of a 20х/0.40 objective is 0.69μm. Chromatic aberrations are corrected for blue and red spherical aberration – for green and the field curvature is corrected for 90% of the field of view diameter.

The objective is designed for the infinity-corrected tube length. The parfocal distance is 45mm. When a 10x/20 mm eyepiece is used the diameter of the field of view is 1mm. The objective is designed to be used with specimens with 0.17mm coverslips.

The lower limit of the microscope’s useful magnification when a 20x objective is used is 200x. Lower magnification does not allow you to distinguish the details of the specimen whose image is formed by the objective. The upper limit of the useful magnification when a 20x objective is used is 400x. Higher magnification is considered “useless” as it provides no new detail in the image of the sample. With the 20x/0.40 objective use the eyepieces with magnifications from 10x to 20x.

Plan achromatic objectives form an image that has the same focus in the center and at the edges and therefore the distortion is negligible. This strength is used for digital imaging and for combining them with wide-field eyepieces with a 20mm field of view.

The objective is suitable for studying the structural details of the specimens from 1µm in size in a large field of view e.g. for analyzing clean catch urine samples.

Compatibility:

• MAGUS Bio 240B Biological Microscope
• MAGUS Bio 240T Biological Microscope
• MAGUS Bio DH240 Biological Digital Microscope