{"product_id":"mitutoyo-m-plan-apo-20x-objective","title":"Mitutoyo M Plan Apo 20x Objective (NA 0.42, WD 20mm, Infinity, M26)","description":"\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003eThe \u003cstrong\u003eMitutoyo M Plan Apo 20× Objective\u003c\/strong\u003e is a plan apochromat objective from Mitutoyo’s M Plan Apo series — delivering 20× magnification with an exceptional 20mm working distance and plan apochromat correction optimized for visible light. The apochromatic optical design provides a flat, chromatic-aberration-free image for accurate color rendering, making this objective an ideal choice for metallurgical examination, semiconductor inspection, and any industrial application requiring true-color imaging at intermediate magnification with extended working clearance.\u003c\/p\u003e\n\n\u003cul style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e \n\u003cli\u003e📏 \u003cstrong\u003eLong working distance: 20mm\u003c\/strong\u003e — exceptional clearance for a 20× objective, providing ample room for specimens in environmental chambers, cryostats, vacuum systems, industrial fixtures, and laser processing setups where standard objectives cannot reach\u003c\/li\u003e\n\u003cli\u003e🔬 \u003cstrong\u003eNA 0.42, 0.7µm resolving power\u003c\/strong\u003e — practical numerical aperture for a long working distance 20× objective, delivering sub-micron resolution for detailed surface inspection, grain structure analysis, and feature measurement\u003c\/li\u003e\n\u003cli\u003e🌟 \u003cstrong\u003ePlan apochromat (M Plan Apo) correction\u003c\/strong\u003e — Mitutoyo’s highest level of chromatic and spherical aberration correction for accurate, flat-field imaging with true color rendering across the full visible spectrum — essential for metallographic examination and color-based defect analysis\u003c\/li\u003e\n\u003cli\u003e🔍 \u003cstrong\u003e1.2mm field of view (×24 eyepiece)\u003c\/strong\u003e — practical field coverage for intermediate-magnification survey and inspection, bridging the gap between wide-area 5×\/10× overview and high-magnification 50×\/100× detail\u003c\/li\u003e\n\u003cli\u003e💡 \u003cstrong\u003eVisible light optimized\u003c\/strong\u003e — the standard visible-light version of the M Plan Apo 20×; for NIR\/SWIR applications, see the M Plan Apo NIR 20× (378-824-16)\u003c\/li\u003e\n\u003cli\u003e♾️ \u003cstrong\u003eInfinity-corrected, M26 thread\u003c\/strong\u003e — compatible with Mitutoyo FS series microscopes and other infinity-corrected systems with M26 nosepieces\u003c\/li\u003e\n\u003cli\u003e🇯🇵 \u003cstrong\u003eMitutoyo quality, made in Japan\u003c\/strong\u003e — precision optical construction for consistent, high-efficiency visible light transmission and long service life\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCatalog number 378-804-3\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cstrong\u003e🔧 Product Description\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003eThe Mitutoyo M Plan Apo 20× (378-804-3) is the intermediate-magnification workhorse of the M Plan Apo visible series — combining 20× magnification with a 20mm working distance and plan apochromat correction for versatile industrial, metallographic, and semiconductor inspection. The 20mm working distance provides clearance for the full range of semiconductor inspection fixtures, environmental chambers, cryostats, vacuum systems, and laser processing setups. The plan apochromat correction delivers a flat, chromatic-aberration-free image with accurate color rendering across the full visible spectrum — critical for metallographic examination where grain structure, phase identification, and surface condition are assessed by color and contrast, and for semiconductor inspection where color-based defect analysis and documentation require accurate chromatic registration. At 20× with a 1.2mm field of view (with ×24 eyepiece), this objective provides a practical balance between field coverage and resolution for intermediate-magnification inspection — the natural step between wide-area 5×\/10× survey and high-magnification 50×\/100× detail in a multi-magnification M Plan Apo workflow. For NIR or SWIR applications at 20×, see the M Plan Apo NIR 20× (378-824-16). Compatible with Mitutoyo FS series microscopes and other infinity-corrected systems with M26 thread nosepieces. Catalog number 378-804-3.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cstrong\u003e🔎 Typical Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e \n\u003cli\u003eMetallographic examination of grain structure, phase identification, and surface condition at 20×\u003c\/li\u003e\n\u003cli\u003eSemiconductor and IC surface inspection at intermediate magnification\u003c\/li\u003e\n\u003cli\u003eDefect analysis and documentation on polished surfaces, thin films, and coatings\u003c\/li\u003e\n\u003cli\u003eIntermediate-magnification imaging in environmental chambers, cryostats, or vacuum systems\u003c\/li\u003e\n\u003cli\u003eInspection of specimens in industrial fixtures requiring 20mm working clearance\u003c\/li\u003e\n\u003cli\u003eIntermediate step in a multi-magnification M Plan Apo workflow (10× → 20× → 50× → 100×)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cstrong\u003e📊 Key Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse; font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align:left; padding: 6px; border: 1px solid #ddd;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding: 6px; border: 1px solid #ddd;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCatalog Number\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e378-804-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eMagnification\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e20×\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e0.42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eImmersion Medium\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eDry (air)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eWorking Distance\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e20mm (Long Working Distance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eSpectral Range\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eVisible light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eResolving Power\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e0.7µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eFocal Depth\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e1.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eField of View (Ø24 eyepiece)\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eØ1.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eReal FOV (1\/2\" chip camera)\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e0.24 × 0.32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eM Plan Apo (Plan Apochromat, visible light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCorrection\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eInfinity-corrected (brightfield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eThread \/ Mount\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eM26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCompatible Systems\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eMitutoyo FS series; other infinity-corrected M26 systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e378-804-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e\u003cem\u003eUniversity and institutional purchase orders are welcome. Please contact us for invoicing and procurement documentation.\u003c\/em\u003e\u003c\/p\u003e","brand":"Spach Optics, Inc.","offers":[{"title":"Default Title","offer_id":52001250083117,"sku":"378-804-3","price":2350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/7965\/8029\/files\/985a8dd92d5572ad7448c1f5e652ba7d.webp?v=1776647388","url":"https:\/\/www.spachoptics.com\/products\/mitutoyo-m-plan-apo-20x-objective","provider":"Spach Optics, Inc.","version":"1.0","type":"link"}