Celestron Digital Microscope Field of View Chart
Celestron Digital 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. For example: the LCD Digital Microscope models would not be good choices when you want to view most or all of a stamp or coin; a Handheld Digital Microscope would not be a good choice to see shapes of mold spores, etc.
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 44301 through 44348 magnification is for the displayed digital image. 44301 Mini Handheld Digital 15x 18mm 30x 11mm 44302-A Handheld Digital 10x 16mm 40x 8.0mm 150x 2.6mm 44310 Portable LCD Digital 3.5x 14mm 54x 800µm 44320 Digital Microscope Kit 40x 700µm 150x 190 µm 300x 90µm 44325-44326 Amoeba 10x 20mm 60x 5.0mm 200x 1.4mm 44340 LCD Digital 40x 1.5mm 100x 600µm 400x 150µm 44345 Deluxe LCD Digital 40x 1.5mm 100x 600µm 200x 300µm 400x 150µm 44348 Pentaview 40x 1.5mm 100x 600µm 200x 300µm 400x 150µm 600x 100µm
Created On: Oct 31 2012 08:53 AM