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» Support Center » Knowledgebase » Handheld Digital Microscopes » Celestron Digital Microscope Field of View Chart
 Celestron Digital Microscope Field of View Chart
Answer 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 Dime18mm
US Forever stamp22x25mm
Small mineral-rock specimen10mm
Jewelry gemstones1-10mm
Printed circuit board component3-5mm
PC board lead0.5mm or 500µm
Human sperm cell5x50µm
Human skin cell100µm
Human egg cell100-200µm
Human red blood cell6-8µm
Amoeba proteus220-740μm
Argentine ant Linepithema humile3mm
Escherichia coli bacterium2.0 x 0.5 μm
Dust mites100-300 µm
Dust mite droppings4-25 µm
Ragweed pollen15-25 µm
Mold spores0.5-20µm


     
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		   
 

Article Details
Article ID: 2635
Created On: Oct 31 2012 08:53 AM

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