La lente frontale presenta una riga (si vedano le foto) che non ne compromette l'ottimo funzionamento ma giustifica il prezzo più basso dell'obbiettivo. Nikon Plan Fluor 20x microscope objective for TL 160, NA 0.5. Although no specific designation is provided, the objective focuses at a distance of more than 2 mm from the sample (Long Working Distance). Excellent cosmetic condition, although some of the markings are slightly worn in certain areas. The front lens has a scratch (see photos) which does not affect its excellent performance, but does justify the lower price of the objective.