Zeiss LD Plan-Neofluar 40x/0.60 KORR Long Working Distance Objective (NA 0.60, Infinity, M27)

The Zeiss LD Plan-Neofluar 40×/0.60 KORR M27 is a long working distance objective engineered 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 working distance range of 1.5–3.3mm reflects the correction collar’s function: as the collar is adjusted to compensate for different substrate thicknesses, the effective working distance changes accordingly, providing optimal spherical aberration correction through plastic vessel bottoms ranging from thin glass coverslips through standard 1.0–1.5mm plastic vessel bottoms. This combination of long working distance and correction collar makes the LD Plan-Neofluar 40× KORR uniquely versatile for live-cell imaging in standard tissue culture conditions without the need to transfer cells to specialized coverslip-bottom dishes. The Plan-Neofluar fluorite design provides excellent chromatic correction and fluorescence transmission for multi-channel imaging. The M27 thread mount is the current Zeiss standard, compatible with Zeiss Axiovert, Axio Observer, Axio Imager, and Axio Examiner microscopes. This unit is offered in lightly used condition with flawless optics at a significant discount to the list price of $4,800. Catalog number 421360.