{"product_id":"mitutoyo-50x-m-plan-apo-objective-378-805-3","title":"Mitutoyo M Plan Apo 50x Objective (NA 0.55, WD 13mm, Infinity, M26)","description":"\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003eThe \u003cstrong\u003eMitutoyo M Plan Apo 50× Objective\u003c\/strong\u003e is a premium plan apochromat objective from Mitutoyo’s M Plan Apo series — delivering 50× magnification with an exceptional 13mm working distance and plan apochromat correction optimized for visible light. With 13mm of working clearance at 50×, this objective provides practical access to specimens in fixtures, chambers, and environments that are completely inaccessible to standard short-working-distance objectives, while delivering sub-micron resolution for detailed surface inspection and analysis.\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: 13mm\u003c\/strong\u003e — exceptional clearance for a 50× 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 0.55, 0.7µm resolving power\u003c\/strong\u003e — practical numerical aperture for a long working distance objective at 50×, delivering sub-micron resolution for semiconductor inspection, surface analysis, and high-magnification industrial imaging\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 across the full visible spectrum at 50×\u003c\/li\u003e\n\u003cli\u003e💡 \u003cstrong\u003eVisible light optimized\u003c\/strong\u003e — the standard visible-light version of the M Plan Apo 50×; for NIR\/SWIR applications (silicon wafer through-inspection, Raman spectroscopy, NIR laser delivery), see the M Plan Apo NIR 50× series (378-825-17 or 378-863-5 HR)\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 378-805-3\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 50× (378-805-3) is a long working distance plan apochromat objective combining 50× magnification with a 13mm working distance — providing the practical balance between magnification and working clearance that makes it one of the most versatile objectives in the M Plan Apo series for industrial and semiconductor inspection. The 13mm working distance provides clearance for the full range of semiconductor inspection fixtures, environmental chambers, cryostats, vacuum systems, and laser processing setups, as well as ample room for beam delivery optics and collection systems that must coexist with the imaging objective. At 50× with a 0.48mm field of view (with Ø24 eyepiece), this objective provides a practical balance between field of view and resolution for detailed surface inspection, defect analysis, and feature measurement. The plan apochromat correction ensures flat-field imaging with accurate chromatic registration across the full visible spectrum, essential for accurate color-based defect analysis and documentation. At NA 0.55 with 0.7µm resolving power, this objective delivers sub-micron resolution for detailed inspection. For NIR or SWIR applications, see the M Plan Apo NIR 50× variants (378-825-17 for maximum WD, 378-863-5 for maximum NA). Compatible with Mitutoyo FS series microscopes and other infinity-corrected systems with M26 thread nosepieces. Catalog number 378-805-3.\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\u003eSemiconductor and IC surface inspection at 50× in visible light\u003c\/li\u003e\n\u003cli\u003eDefect analysis and documentation on polished surfaces, thin films, and coatings\u003c\/li\u003e\n\u003cli\u003eHigh-magnification imaging in environmental chambers, cryostats, or vacuum systems\u003c\/li\u003e\n\u003cli\u003eInspection of specimens in industrial fixtures or assemblies requiring 13mm clearance\u003c\/li\u003e\n\u003cli\u003eLaser processing and micro-machining requiring simultaneous visible-light imaging at 50×\u003c\/li\u003e\n\u003cli\u003eAny application requiring 50× magnification where standard working distance is insufficient\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;\"\u003e378-805-3\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;\"\u003e50×\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;\"\u003e0.55\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;\"\u003e13mm (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;\"\u003e0.9µm\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;\"\u003e4mm\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;\"\u003eØ0.48mm\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;\"\u003e0.10 × 0.13mm\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;\"\u003e378-805-3\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":51695314927917,"sku":"378-805-3","price":3075.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/7965\/8029\/files\/b92672638fd83aefcdbcbdf47dd64c52.webp?v=1776643086","url":"https:\/\/www.spachoptics.com\/products\/mitutoyo-50x-m-plan-apo-objective-378-805-3","provider":"Spach Optics, Inc.","version":"1.0","type":"link"}