Zeiss LD Plan-Neofluar 63x/0.75 KORR PH2 Long Working Distance Objective (NA 0.75, Infinity, RMS)

The Zeiss LD Plan-Neofluar 63×/0.75 KORR PH2 is a purpose-built long working distance objective for cell biology workflows where specimens are imaged through thick plastic substrates — multi-well plates, Petri dishes, T-flasks, and imaging chambers — that standard short-working-distance objectives cannot accommodate. The 2.2mm working distance provides ample clearance for the full range of standard tissue culture vessels, while the exceptionally wide correction collar range (0–1.5mm) enables optimal spherical aberration correction through plastic bottoms of varying thickness, from thin glass coverslips through standard 1.0–1.5mm plastic vessel bottoms. This combination makes the LD Plan-Neofluar 63× KORR uniquely versatile for live-cell imaging in standard tissue culture conditions without the need to transfer cells to specialized coverslip-bottom dishes. The integrated PH2 phase ring enables high-contrast phase contrast imaging of living cells alongside fluorescence, making this a comprehensive objective for cell biology labs that need both modalities at 63×. The Plan-Neofluar fluorite design provides good chromatic correction and fluorescence transmission for multi-channel imaging. This unit is offered in excellent condition with flawless optics at a significant discount to the new list price of $6,500. RMS thread mount — compatible with standard RMS nosepiece microscopes. Catalog number 441371-9970.