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The National 740-155 40x Retractable Objective Lens is for use with the 155 microscope series. It features a 0.65 numerical aperture and 40x magnification. A retractable objective lens provides additional protection…
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The National 740-155 40x Retractable Objective Lens is for use with the 155 microscope series. It features a 0.65 numerical aperture and 40x magnification. A retractable objective lens provides additional protection against lens or slide damage.
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