MAGUS 20HP 20х/0.40 Plan L phase PHP2 ∞/1.2 SzM 8.0 mm objective

The phase objective was designed in such a way that it can also be used to study living specimens that are indistinguishable or barely visible without contrast. In this case, it is not possible to stain the microorganisms, as they would die. Phase contrast makes microorganisms visible without directly affecting or harming them.

For phase-contrast observation, you will need a phase condenser. The 20HP objective was combined with a ring diaphragm marked 20x or a phase-contrast ring plate with a ring matching the 20x objective.

The 20HP model has a 20x magnification value and works best with eyepieces between 10x and 20x magnification values. Their combined useful microscopic magnification is between 200x and 400x. There is no point in putting an eyepiece with a different magnification into the system, as either the image will not be informative enough, or it will be too detailed and will not provide additional information. The lens can distinguish individual elements of the sample if they are at least 0.69 µm apart.

The lens has a large flat field of view that covers 90% of the entire visible surface and focuses equally well over the entire visible area. This function works well with a digital camera or a 22 mm field of view eyepiece. With a 10x/22 mm eyepiece, the field of view is 1.1 mm. The lens corrects chromatic aberration in two wavelength ranges (blue and red) and spherical distortion in one wavelength range (green).

The 20HP model is mounted on a biological or fluorescence inverted microscope. It is suitable for studying samples placed in laboratory vessels with a bottom thickness of 1.2 mm. The lens is corrected to infinity; the parfocal distance is 45 mm.

Specifications
- Lens material: optical glass
- Lens class according to aberration correction: plane-achromatic
- Tube length: corrected to infinity (∞)
- Contrast technique: phase contrast
- Degree of magnification, (multiplier): 20
- Aperture: 0.40
- Working distance, mm: 8.0
- Parfocal distance, mm: 45
- Bottom thickness, mm: 1.2
- Frame with spring structure: −
- Immersion: −
- Frame material: copper

Compatibility
- MAGUS Bio V300 biological inverted microscope
- MAGUS Bio V350 biological inverted microscope
- MAGUS Lum V500 fluorescence inverted microscope
- MAGUS Lum V500L fluorescence inverted microscope