Microscopy Magnification Calculator

Total magnification is calculated by multiplying the objective lens magnification by the eyepiece magnification and any additional magnification factors (tube lens, camera relay). For example: 40× objective × 10× eyepiece = 400× total magnification.

Field of view (FOV) is the diameter of the circular area visible through the microscope. It's calculated by dividing the eyepiece field number by the objective magnification. Higher magnifications result in smaller fields of view.

Numerical aperture (NA) determines the resolution and light-gathering ability of the objective lens. Higher NA objectives provide better resolution but typically have smaller working distances and require specific mounting media.

Optical magnification is achieved through the lens system and provides true resolution enhancement. Digital magnification enlarges the image electronically but doesn't improve resolution beyond what the optics provide.

Start with lower magnifications (4×-10×) for sample overview and navigation, then move to higher magnifications (40×-100×) for detailed examination. The choice depends on specimen size and required resolution.

Effective pixel size is the actual sample dimension represented by each camera pixel, calculated by dividing the camera pixel size by the total magnification. Smaller effective pixel sizes provide higher spatial sampling.

Proper magnification matching ensures optimal sampling of the optical resolution. Too low magnification undersamples detail, while too high magnification provides empty magnification without additional information.

Tube lens magnification is an additional magnification factor in infinity-corrected microscope systems. It affects the overall system magnification and can be adjusted to optimize the magnification for specific camera sensors.