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Nikon LWD (Long Working Distance) 10x Plan Achromat objectives have a Numerical Aperature of 0.25, Working Distance is 10.5mm and Focal Length of 14.60mm. They allow more space between the specimen and the tip of the objective for manipulation or manual cell marking.

Will fit the Nikon Alphaphot, Labophot, Optiphot and Microphot series of microscopes as well as Olympus, Leitz, and Zeiss 160mm tube-length microscopes.

The Nikon product number is 79575 and they had a most-recent list price of $296.00.