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The objective lens is the main microscope lens used to magnify tiny objects or examine minute specimens that are a part of larger objects that are otherwise invisible to the naked eye. Other lenses simply provide additional fine focus or illumination. Continue Reading.
Our microscope has four objective lens settings (scanning lens, 4X; low power lens,10X; high dry power lens, 45X and oil immersion lens,100X); the ocular lens is always set at 10X. Calculate the total magnification of a specimen if the objective lens were set at 45X.