When changing magnification the image remains perfectly in focus & centered.
The rotatable 360° polarizer fits on the collector lampCONDENSERHeight adjustable Abbe condenser N.OBJECTIVESSupplied w/ semi plan 4x/0. BioBlue 40X-1000X Monocular Portable Compound Microscope Precision 2 μm per graduation, 0.Features :Monocular w/ 45° inclined tubes1W LED illumination w/ rechargeable batteries & integrated power supplyWF10x/18mm eyepiece(s)Ergonomic StandReversed nosepiece for four semi plan objectivesCoaxial coarse & fine adjustments w/ rack stopHeight adjustable abbe condenser w/ iris diaphragm & filter holderSpecifications :EYEPIECE(S)WF10x/18 mm Wide fieldSecured & w/ pointer for monocular modelsHEADAll heads are 360° rotatable & securedMonocular model w/ 45° inclined tubesNOSEPIECEReversed quadruple nosepiece on ball bearings.