# Part name: PZO microscope iris diaphragm for K3Ph phase contrast condenser | K3Ph1, KS and K4Ph compatible # Original page URL: https://www.microscopeparts.eu/part/pzo-biolar-microscope-iris-diaphragm-for-k3ph-phase-contrast-condenser-k3ph1-ks-and-k4ph-compatible-99858 # Part manufacturer: PZO # Full manufacturer name: Polskie Zaklady Optyczne # Other names of this manufacturer: - PZO Warszawa - PZO Poland - PZO Warszawa Poland These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products. # Belongs to category: Iris diaphragms # Description and specifications: Iris diaphragm module - a component of PZO phase contrast microscope condensers. An iris diaphragm of this type is fitted in the following phase contrast condensers: - PZO K3Ph - PZO K3Ph1 - PZO K4Ph - PZO KS (this is the "stereo contrast" condenser sold with PZO MB30S microscopes. There are no(!) markings or numbers whatsoever on this condenser) The diaphragm blades themselves, which are located inside this module, also fit the diaphragms installed in the following condensers: - PZO K3PhZ (variable phase contrast) - PZO KPI2 (condenser for Pluta DIC) Mechanically, this diaphragm is screwed onto the lower part of the phase contrast condenser. The housing of the diaphragm module has a 32 mm male thread. The complete diaphragm with its housing has a diameter of 52 mm. The iris diaphragm is damaged very often. Replacing it can solve the following problems: - when the small lever used to open and close the diaphragm blades breaks off. This is a common failure, because this lever is a thin sheet made of a brittle alloy - when the diaphragm blades get damaged, bent or broken. This is one of the most common faults in microscopes - when the diaphragm blades jump out of their mounting grooves and you cannot reassemble them - when the diaphragm stops opening and closing and is completely seized. This happens when the grease has dried out or rust has glued the blades together The last photos in the gallery show the PZO KS condenser, with an arrow indicating where this diaphragm is located inside the condenser. This allows the component to be identified unambiguously. PZO phase contrast condensers are often fitted in microscopes from manufacturers other than PZO, so the component presented here is not a repair part for one specific microscope model. This diaphragm will help to repair a phase contrast condenser - regardless of which microscope model and which manufacturer it works in. # Examples of use - as a service part for repairing a PZO phase contrast condenser. Some of the faults this can remedy are listed in the description # Removed from microscope: PZO Biolar # Also compatible with the following microscopes: - PZO PZO K3Ph Phase Contrast Microscope Condenser (K4Ph, K3Ph1) - PZO Biolar - PZO MB-30 - PZO MB 30S - PZO KS condenser # Names, descriptions, terms, and search contexts under which this part is searched. - PZO Biolar microscope repair parts - moduł przysłony irysowej kondensora PZO K3Ph - PZO K3Ph iris diaphragm module phase contrast condenser - PZO K3Ph Irisblende Phasenkontrastkondensor - PZO K3Ph1 K4Ph iris diaphragm blades broken - PZO K4Ph Irisblende Lamellen verbogen - PZO KS Kondensor MB30S Irisblende - Stereokontrast - PZO KS stereo contrast condenser iris diaphragm - PZO K3PhZ variabler Phasenkontrast Blendenlamellen - PZO KPI2 Pluta DIC condenser iris blades replacement - PZO Biolar Irisblende klemmt - reparieren - PZO Biolar phase contrast condenser iris stuck - PZO Studar Kondensor Irisblende Hebel abgebrochen - PZO Studar condenser iris diaphragm lever broken - PZO MB30 Kondensor Irisblende Ersatz - PZO MB30 condenser iris diaphragm DIY repair - PZO 32 mm Gewinde Irisblende Kondensor - clona irisowa kondensora fazowego PZO - irisová clona kondenzoru PZO - diafragma iris condensador PZO Biolar - diafragma iris contraste de fases PZO - diaframma a iride condensatore PZO Biolar - diaframma a iride contrasto di fase PZO - PZO buy spare parts # Related URLs: - Markdown po polsku: https://www.serwismikroskopowy.pl/part/99858.md - Markdown auf Deutsch: https://www.mikroskopteile.de/part/99858.md - Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99858-pzo-biolar-microscope-iris-diaphragm-for-k3ph-phase-contrast-condenser-k3ph1-ks-and-k4ph-compatible - Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99858.media.md - Representative photo: https://www.microscopeparts.eu/photo/pzo-biolar-microscope-iris-diaphragm-for-k3ph-phase-contrast-condenser-k3ph1-ks-and-k4ph-compatible-99858-2 - Representative video: https://www.microscopeparts.eu/play/99858-1 - Other parts from category Iris diaphragms: https://www.microscopeparts.eu/iris-diaphragms - More Iris diaphragms removed from microscope PZO Biolar: https://www.microscopeparts.eu/iris-diaphragms/from/pzo/biolar - More Iris diaphragms compatible with microscope PZO Biolar: https://www.microscopeparts.eu/iris-diaphragms/for/pzo/biolar - More Iris diaphragms removed from microscopes PZO: https://www.microscopeparts.eu/iris-diaphragms/from/pzo - More Iris diaphragms compatible with microscopes PZO: https://www.microscopeparts.eu/iris-diaphragms/for/pzo # Important information: Database Description: Technical microscope parts database based on years of practical service experience. Source URL: https://www.microscopeparts.eu Author: Piotr z Polski Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL. Language: en-GB Last Updated: 2026-10-05