MRJ-03P BINOCULAR MICROSCOPE
Identical features of the MRJ-03 except:
4x, 10x, 40x, 100x (oil) PLAN Objectives
Three generally accepted levels of correction/quality for microscope objectives are achromatic, semi-planar, and planar. Achromatic objectives - the most common type - have a flat field in about the center 65% of the image. Planar, or plan, objectives correct best for color and spherical aberations, and display better than 95% of the field flat and in focus. Semi-planar objectives (sometimes called semi-plan or micro-plan) are intermediate to the other two types with about 80% of the field appearing flat.
Field Flatness Measured Radially From Center