Celestron Optical Microscope Field of View Chart
Celestron Optical Microscope Field of View Chart The field of view (FOV) is given for the microscopes at each power. If the FOV is less than 1 millimeter (mm), then the size is given in micrometers (microns, µm – one millimeter equals 1000 microns). The number given is either the diameter of the FOV or its longest dimension. In general, FOV decreases as magnification increases. Higher magnifications also have very shallow depth of focus and smaller working distances too. In short, high magnifications should only be used for very small subjects or portions of subjects. (Note: these figures are approximate and may differ from the actual instrument.) As comparisons, here is a table of commonly imaged subjects and their sizes either in mm or µm. Use this table with the main chart to help you decide which microscope and magnification you need to view your particular subject best.
US Dime 18mm US Forever stamp 22x25mm Small mineral-rock specimen 10mm Jewelry gemstones 1-10mm Printed circuit board component 3-5mm PC board lead 0.5mm or 500µm Human sperm cell 5x50µm Human skin cell 100µm Human egg cell 100-200µm Human red blood cell 6-8µm Amoeba proteus 220-740μm Argentine ant Linepithema humile 3mm Escherichia coli bacterium 2.0 x 0.5 μm Dust mites 100-300 µm Dust mite droppings 4-25 µm Ragweed pollen 15-25 µm Mold spores 0.5-20µm
For models 44121 through 44206 magnifications is visual - eyepiece and objective together. Model Number-Name Magnification and field of view 44121 Microscope Kit 40-80x 3.0-1.5mm 150-300x 800-400µm 300-600x 400-200µm 44125 Microscope 360 40x 3.8mm 64x 3.5mm 100x 1.5mm 160x 1.4mm 400x 375µm 640x 350µm 44102 Laboratory 40x 4.4mm 100x 1.8mm 400x 440µm 44104 Advanced 500 40x 4.4mm 50x 3.5mm 100x 1.8mm 125x 1.4mm 400x 440µm 500x 350µm 44106 Advanced 1000 40x 4.4mm 100x 1.8mm 400x 440µm 1000x 180µm 44108 Professional 1500 40x 4.4mm 60x 2.9mm 100x 1.8mm 150x 1.2mm 400x 440µm 600x 290µm 1000x 180µm 1500x 120µm 44202 Advanced Stereo 20x 9.8mm 40x 4.9mm 44206 Professional Stereo 10.5x 20mm 68x 3.0mm
Created On: Dec 12 2012 09:24 AM