{"product_id":"olympus-dplan-50x-oil-immersion-objective","title":"Olympus DPlan 50x Oil Immersion Objective","description":"\u003cp style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cstrong\u003eOlympus D Plan 50X Oil Immersion Objective with Iris for BHT, BHTU, BHS, CHS \u0026amp; CHT Microscopes (1-LB555)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e🔬 \u003cstrong\u003e50X oil immersion with iris diaphragm\u003c\/strong\u003e — high-magnification versatility with adjustable NA\u003c\/li\u003e\n\u003cli\u003e📐 \u003cstrong\u003eNA 0.90 \/ WD 0.23mm\u003c\/strong\u003e — exceptional resolving power for fine structural detail\u003c\/li\u003e\n\u003cli\u003e🔩 \u003cstrong\u003eRMS thread \/ 160mm tube length\u003c\/strong\u003e — fits Olympus BHT, BHTU, BHS, CHS, CHT and compatible 160mm systems\u003c\/li\u003e\n\u003cli\u003e🌟 \u003cstrong\u003eD Plan (Achromat) optics\u003c\/strong\u003e — reliable correction for routine high-magnification brightfield work\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCondition: Excellent — flawless optics\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🔧 Product Description\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Olympus D Plan 50X Oil Immersion objective (part number 1-LB555) is a high-magnification achromat with a built-in iris diaphragm, designed for the Olympus BHT, BHTU, BHS, CHS, and CHT microscope series. At 50X with a maximum NA of 0.90, it delivers the resolving power needed to clearly distinguish fine subcellular structures, microorganisms, and material surface features at a magnification level that sits between the common 40X dry and 60X\/100X oil objectives.\u003c\/p\u003e\n\u003cp\u003eThe integrated iris diaphragm is a particularly useful feature — it allows you to continuously adjust the effective numerical aperture without changing objectives. Stopping down the iris reduces NA, which increases depth of field and improves contrast on low-contrast specimens, while opening it fully maximizes resolution. This makes the 50X iris objective especially practical for metallurgy, materials inspection, and any application where specimen contrast varies significantly.\u003c\/p\u003e\n\u003cp\u003eOil immersion at this magnification eliminates the refractive index mismatch between the objective front element and the coverslip, ensuring maximum light collection and sharpest possible images. Standard RMS threading and 160mm tube length make this a direct drop-in for any BHT\/BHS\/CH-era Olympus nosepiece. This unit is in excellent condition with flawless optics.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e🔎 Typical Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHematology and blood smear examination\u003c\/li\u003e\n\u003cli\u003eBacteriology and microbial morphology\u003c\/li\u003e\n\u003cli\u003eMetallurgical and materials surface inspection\u003c\/li\u003e\n\u003cli\u003eHigh-magnification histology and cytology\u003c\/li\u003e\n\u003cli\u003eReplacement or upgrade 50X objective for BHT, BHS, CHS, or CHT systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e📊 Key Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1-LB555\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eOlympus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eD Plan (Achromat)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification\u003c\/td\u003e\n\u003ctd\u003e50X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImmersion Medium\u003c\/td\u003e\n\u003ctd\u003eOil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIris Diaphragm\u003c\/td\u003e\n\u003ctd\u003eYes — adjustable NA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd\u003e0.90 (max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Distance (WD)\u003c\/td\u003e\n\u003ctd\u003e0.23mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread\u003c\/td\u003e\n\u003ctd\u003eRMS (Royal Microscopical Society)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e160mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Microscopes\u003c\/td\u003e\n\u003ctd\u003eOlympus BHT, BHTU, BHS, CHS, CHT and other 160mm RMS systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eExcellent \/ Flawless Optics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003cp\u003e📋 \u003cem\u003eUniversity and institutional purchase orders accepted. Contact us with any questions — we're happy to help you find the right objective for your Olympus system.\u003c\/em\u003e\u003c\/p\u003e","brand":"spachoptics","offers":[{"title":"Default Title","offer_id":51695368503597,"sku":"1-LB555","price":495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/7965\/8029\/files\/OLYMPUS-1-LB555-2.jpg?v=1765519133","url":"https:\/\/www.spachoptics.com\/products\/olympus-dplan-50x-oil-immersion-objective","provider":"Spach Optics, Inc.","version":"1.0","type":"link"}