1. The microscope with the largest power is the best.
As we discussed above, you need to think about many elements, not just the magnification. Even if you have a very high power microscope, sometimes you still have to use the low power to view your specimen since lower power allows you to have a wider field of view and a larger working distance.
As we discussed above, you need to think about many elements, not just the magnification. Even if you have a very high power microscope, sometimes you still have to use the low power to view your specimen since lower power allows you to have a wider field of view and a larger working distance.
2. "Big eye" eyepieces are better than "small eye" ones.
"Big eye" means the lens glass on the top of an eyepiece is big in diameter. Actually the field of view is decided by the diameter of the bottom (not the very end, but close to the bottom) of the eyepiece. You may find the size of the viewfield from the specification of the eyepiece. For example: WF10X/20, means the viewfield is 20mm in diameter, WF10X/22 means the viewfield is 22mm in diameter. WF10X/22 will have larger viewfield than WF10X/20, no matter if the top lens is "big eye" or not. Of course, for the same viewfield, "big eye" is better than "small eye". If the viewfield is not specified, you may measure it with a vernier caliper of a regular ruler (may not be accurate but can see the difference). Find the smallest ring of the eyepiece frame through the bottom of the the eyepiece and measure it.
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