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Zeiss Plan Apo 40x Oil Iris Phase Objective

Zeiss Plan Apo 40x Oil Iris Phase Objective

All 160mm Tube Length Microscopes

Photomicroscope, Universal, Standard, Ultraphot

IM Series, IDO3

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Zeiss Plan Apo 40x/1.00 oil iris phase contrast objective for 160mm tube length microscopes.  Plan Apo objectives deliver the highest numerical aperture, color correction and flatness for the most demanding applications.  Phase contrast requires matching Ph3 ring in condenser.  Contains iris to adjust NA from 1.0 - 0.6.  This allows you to increase your depth of focus or bring the objective into an NA that is compatible with darkfield.  Standard RMS thread mount.    

Excellent condition with flawless optics.  Spring tip has good movement.  Bench tested on Universal stand - image is sharp and crisp.  

All of our used parts are thoroughly cleaned, refurbished and tested by our knowledgeable staff and your satisfaction is guaranteed.  The item pictured is the actual item for sale.  We offer no questions asked returns for 7 days after receipt (less cost of shipping).  All used items carry a 90 day warranty against defects which will be honored with a full refund or replacement with like item.  If you have any questions or would like additional photographs, please email us at  If you do not see the item you are looking for please email us as many times we have inventory we have not yet listed online.  


  • Zeiss p/n 5227286
  • Magnification: 40x
  • Numerical Aperture: 1.00 - 0.60 w/ iris
  • Oil Immersion
  • Correction:  Plan Apo
  • Ph3 ring
  • Use with or without coverslip
  • 160mm tube length
  • Working Distance:
  • RMS thread