Celestron Optical Microscope Field of View Chart

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	Celestron Optical Microscope Field of View Chart

Answer 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