The Nikon E400 is configured for phase contrast microscopy. This microscope can be customized to meet your specific needs. We offer this with your choice of viewing head - binocular, ergo binocular, or trinocular. All options will come with a pair of 10x/22mm eyepieces. You can choose between 4x, 10x, 20x, 40x or 4x, 10x, 20x, 40x, 100x objective options. The phase turret condenser allows you to easily change the position to match your objective lens. This microscope comes fully serviced with a warranty. Nikon E400 Phase Contrast Microscope Specifications Head: Binocular, Ergonomic Binocular, or Trinocular Eyepieces: CFI 10X/22mm Objectives: Choose: 4x Brightfield - Phase Contrast 10x, 20x, 40x Or 4x Brightfield - Phase Contrast 10x, 20x, 40x, 100x Oil Stage: Mechanical XY Stage Condenser: 0.9 N.A. Phase Contrast Turret Condenser Focus: Coarse & Fine Focus Illumination: 6V 30W halogen - Can upgrade to LED Warranty: 1 Year Mechanical