Zeiss LD A-Plan 20x/0.35 Ph1 M27 Thread Size - 421251-9910 (Used)

The Zeiss LD A-Plan 20x/0.35 Ph1 is a high-quality **long working distance (LD) achromatic phase contrast objective** designed for **phase contrast (Ph1), brightfield, and fluorescence microscopy**. With a **numerical aperture (NA) of 0.35**, this objective provides superior contrast, resolution, and flat-field correction, making it ideal for **live-cell imaging and unstained sample observation**. The **M27 thread size** ensures compatibility with Zeiss Axio series and other M27-compatible microscopes.

Condition

Refurbished/Used
(This product has been inspected and verified to meet manufacturer specifications.)

Included Items

• Zeiss LD A-Plan 20x/0.35 Ph1 Objective

Key Features

• 20x magnification for high-resolution imaging
• Long working distance (LD) for improved focus on thick samples
• Plan Achromatic (A-Plan) optics for enhanced contrast and color correction
• Numerical aperture (NA) of 0.35 for improved light transmission
• Phase Contrast (Ph1) optimized for unstained biological samples
• M27 thread size for compatibility with Zeiss Axio series and other standard microscopes
• Flat field correction for sharp, edge-to-edge imaging
• Optimized for fluorescence, phase contrast, and brightfield microscopy with high transmission coatings

Applications

• Phase contrast microscopy (Ph1)
• Fluorescence microscopy
• Brightfield microscopy
• Live-cell imaging
• Pathology and histology
• Biological and clinical research

Specifications

Specification	Details
Magnification	20x
Numerical Aperture (NA)	0.35
Working Distance	~7.9 mm
Immersion Medium	Air (Dry)
Cover Glass Thickness	0.17 mm
Optical Correction	Plan Achromatic (Flat Field, High Contrast, Phase Contrast Optimized)
Thread Size	M27 (27mm thread diameter)
Parfocal Distance	60 mm
Compatible Microscopes	Zeiss Axio series and other M27-compatible models
Special Features	Long working distance for thick sample imaging, optimized for phase contrast and fluorescence imaging