{"product_id":"nikon-cfi-plan-fluor-20x-mi-multi-immersion-objective","title":"Nikon CFI Plan Fluor 20x MI Multi-Immersion Objective (NA 0.75, Oil\/Water\/Glycerin\/Silicone, Infinity)","description":"\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003eThe \u003cstrong\u003eNikon CFI Plan Fluor 20× MI Multi-Immersion Objective (NA 0.75)\u003c\/strong\u003e is a uniquely versatile objective supporting four immersion media — oil, water, glycerin, and silicone — in a single objective with a correction collar for refractive index adjustment. This eliminates the need to swap objectives when changing immersion media or specimen types, making it an exceptional choice for labs that image across multiple specimen preparations and imaging conditions. Offered here in excellent condition with flawless optics at significant savings versus the new list price.\u003c\/p\u003e\n\n\u003cul style=\"font-family: 'Segoe UI Emoji', sans-serif; color: rgb(0,0,0);\"\u003e \n\u003cli\u003e💧 \u003cstrong\u003eFour immersion media: oil, water, glycerin, and silicone\u003c\/strong\u003e — a single objective covers the full range of common immersion media, enabling refractive index matching to virtually any biological specimen type without changing objectives\u003c\/li\u003e\n\u003cli\u003e🔧 \u003cstrong\u003eCorrection collar for RI adjustment\u003c\/strong\u003e — adjustable correction for optimal spherical aberration compensation across different immersion media and specimen conditions\u003c\/li\u003e\n\u003cli\u003e🌟 \u003cstrong\u003ePlan Fluor optical design\u003c\/strong\u003e — fluorite glass elements providing excellent chromatic correction and high UV-visible transmission for multi-channel fluorescence and brightfield imaging\u003c\/li\u003e\n\u003cli\u003e🔬 \u003cstrong\u003eNA 0.75 at 20×\u003c\/strong\u003e — high numerical aperture for a multi-immersion objective, delivering good resolution and fluorescence light collection across all supported immersion media\u003c\/li\u003e\n\u003cli\u003e♾️ \u003cstrong\u003eInfinity-corrected, M25 thread\u003c\/strong\u003e — compatible with Nikon CFI series microscopes including Eclipse Ti2, Ti, Ni, E, and FN series\u003c\/li\u003e\n\u003cli\u003e🇯🇵 \u003cstrong\u003eNikon quality, made in Japan\u003c\/strong\u003e — precision optical construction for consistent, high-efficiency light transmission and long service life\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCondition: Excellent — flawless optics\u003c\/strong\u003e — catalog number MRH07241\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 Nikon CFI Plan Fluor 20× MI is one of the most versatile objectives available for biological microscopy — supporting oil (n=1.515), water (n=1.333), glycerin (n≈1.45), and silicone (n=1.40) immersion in a single objective with a correction collar for refractive index adjustment. This multi-immersion capability eliminates the need to swap objectives when changing between specimen types or imaging conditions: oil immersion for maximum NA on fixed specimens, water immersion for live-cell imaging in aqueous media, glycerin for refractive index matching to biological tissue, and silicone for deep tissue imaging where silicone’s refractive index (n=1.40) closely matches biological cytoplasm (~1.38). The correction collar allows fine adjustment of spherical aberration correction for each immersion medium, ensuring optimal image quality regardless of the immersion type used. The Plan Fluor fluorite design provides excellent chromatic correction and high UV-visible transmission for multi-channel fluorescence imaging. At 20× with NA 0.75, this objective provides a wide field of view for imaging large specimens, organoids, tissue sections, and multi-cell preparations across all immersion conditions. This unit is offered in excellent condition with flawless optics at a significant discount to the new list price of $5,275. Compatible with Nikon CFI series microscopes. Catalog number MRH07241.\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\u003eMulti-specimen labs requiring flexibility across oil, water, glycerin, and silicone immersion\u003c\/li\u003e\n\u003cli\u003eLive-cell fluorescence imaging in aqueous media (water immersion mode)\u003c\/li\u003e\n\u003cli\u003eDeep tissue and organoid imaging with refractive index matching (glycerin or silicone mode)\u003c\/li\u003e\n\u003cli\u003eFixed specimen fluorescence imaging at maximum NA (oil immersion mode)\u003c\/li\u003e\n\u003cli\u003eWide-field imaging of tissue sections, organoids, and multi-cell preparations at 20×\u003c\/li\u003e\n\u003cli\u003eAny workflow requiring immersion media flexibility without objective changes\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;\"\u003eMRH07241\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;\"\u003e0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eImmersion Media\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eOil (n=1.515), Water (n=1.333), Glycerin (n≈1.45), Silicone (n=1.40)\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;\"\u003e0.33–0.51mm (varies by immersion medium)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCorrection Collar\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eYes — for RI adjustment across immersion media\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;\"\u003eCFI Plan Fluor MI (Multi-Immersion, fluorite)\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\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;\"\u003eM25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eCompatible Microscopes\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eNikon CFI Eclipse Ti2, Ti, Ni, E, FN series\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;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eExcellent — flawless optics\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;\"\u003eMRH07241\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":51695345828141,"sku":"MRH07241","price":3300.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/7965\/8029\/files\/NIKON-MRH07241-2.gif?v=1765517032","url":"https:\/\/www.spachoptics.com\/products\/nikon-cfi-plan-fluor-20x-mi-multi-immersion-objective","provider":"Spach Optics, Inc.","version":"1.0","type":"link"}