Paraxial optical system for real erect image with optimum resolution. Long working distance plan optics for bright field and phase contrast observation. Recommended for using micromanipulators, probes and other instruments. Ultra long working distance condenser 70mm for uniform brilliant illumination. “OPTOLAB-PH-T” UNIVERSAL TRINOCULAR PHASE CONTRAST INVERTED TISSUE CULTURE MICROSCOPE Supplied with: Wide field Eyepiece: WF10x (F.No.18 mm) paired and long Working Distance Plan Phase Objective (4 Nos): PL4x, PLLPH10x, PLLPH 20x/25x & PLLPH 40x, Complete with Phase annulus slider for 10x, 20x/25x, 40x, objectives, centering telescope and one each blue filter, white frosted filter and green filter. “OPTOLAB-BR-T” TRINOCULAR INVERTED TISSUE CULTURE MICROSCOPE (BRIGHT FIELD) Supplied with Wide field Eyepiece WF 10x paired (Field No. 18) Long Working Distance Plan Objective (4 Nos) PL4x, PL-L10x, PL-L20x & PL-L 40x. Complete with one each blue filter, white frosted filter & green filter on their respective mounts. Supplied in the thermocol packing.