{"product_id":"olympus-uapo-n-340-40x-water-immersion-objective","title":"Olympus UApo N 340 40X Water Immersion Microscope Objective (NA 1.15, Infinity, UV Optimized)","description":"\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cb\u003eSpecialized 40× water immersion apochromat objective with high UV transmission (340nm) for Fura-2 calcium imaging and ratiometric fluorescence applications.\u003c\/b\u003e\u003c\/p\u003e\n\u003cul style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\n\u003cli\u003e💧 \u003cb\u003eWater Immersion Design\u003c\/b\u003e — Optimized for imaging living cells in aqueous media with minimal optical aberration.\u003c\/li\u003e\n\u003cli\u003e🔬 \u003cb\u003e40× Magnification, ~1.15 NA\u003c\/b\u003e — High numerical aperture provides excellent resolution and light collection.\u003c\/li\u003e\n\u003cli\u003e🔬 \u003cb\u003e340nm UV Transmission\u003c\/b\u003e — Specialized for Fura-2 calcium imaging and UV-excitable fluorophores.\u003c\/li\u003e\n\u003cli\u003e🌟 \u003cb\u003eApochromat Optics\u003c\/b\u003e — Superior chromatic correction for ratiometric imaging and multi-wavelength applications.\u003c\/li\u003e\n\u003cli\u003e📏 \u003cb\u003e~0.25mm Working Distance\u003c\/b\u003e — Short working distance optimized for high NA and UV transmission.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2 style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e🔧 Product Description\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003eThe \u003cb\u003eOlympus UAPO N 340 40x Water Immersion Objective (N2709300)\u003c\/b\u003e is a specialized biological objective designed for \u003cb\u003eFura-2 calcium imaging and other UV-excitable fluorescence applications\u003c\/b\u003e. This objective is distinguished by its \u003cb\u003ehigh UV transmission down to 340nm\u003c\/b\u003e, enabling ratiometric calcium imaging with Fura-2—one of the most widely used calcium indicators in cell biology and neuroscience.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003eThe \u003cb\u003e40× magnification and ~1.15 numerical aperture\u003c\/b\u003e provide \u003cb\u003ehigh resolution and excellent light collection\u003c\/b\u003e, critical for detecting the relatively weak fluorescence signals from calcium indicators. The high NA ensures efficient excitation and emission light collection, improving signal-to-noise ratio in fluorescence imaging.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cb\u003eFura-2 calcium imaging\u003c\/b\u003e is a ratiometric technique that measures intracellular calcium concentration by exciting the dye at two wavelengths (340nm and 380nm) and measuring the ratio of emission intensities. This approach provides quantitative calcium measurements that are independent of dye concentration, photobleaching, and cell thickness. The \u003cb\u003e340nm UV transmission\u003c\/b\u003e of this objective is essential for exciting Fura-2 at its calcium-bound excitation peak, enabling accurate ratiometric measurements.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003eStandard microscope objectives typically have poor transmission below 400nm due to absorption by optical glass and cement. This objective employs \u003cb\u003especialized UV-transmitting glass and optical coatings\u003c\/b\u003e that maintain high transmission at 340nm, enabling efficient Fura-2 excitation. This UV transmission also makes the objective suitable for other UV-excitable fluorophores including DAPI, Hoechst dyes, and Indo-1.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003eThe \u003cb\u003eApochromat (UAPO) optical design\u003c\/b\u003e provides \u003cb\u003esuperior chromatic aberration correction\u003c\/b\u003e across a broad wavelength range from UV to visible. This correction is essential for ratiometric imaging where precise registration between different wavelength channels is critical for accurate ratio calculations.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003eThe \u003cb\u003e~0.25mm working distance\u003c\/b\u003e is short but typical for high-NA water immersion objectives. This working distance is optimized for imaging cells on coverslips or in thin chambers.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003eWater immersion is ideal for \u003cb\u003elive-cell calcium imaging\u003c\/b\u003e as water is non-toxic to cells and maintains physiological conditions during long-term experiments.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003eThe \u003cb\u003einfinity-corrected optical design\u003c\/b\u003e with \u003cb\u003eRMS thread mount\u003c\/b\u003e is compatible with Olympus BX, CX, and IX series microscopes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2 style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e🔎 Typical Applications\u003c\/h2\u003e\n\u003cul style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\n\u003cli\u003eFura-2 ratiometric calcium imaging\u003c\/li\u003e\n\u003cli\u003eIntracellular calcium dynamics and signaling\u003c\/li\u003e\n\u003cli\u003eNeuroscience and synaptic physiology\u003c\/li\u003e\n\u003cli\u003eCardiac myocyte calcium transients\u003c\/li\u003e\n\u003cli\u003eUV-excitable fluorophore imaging (DAPI, Hoechst, Indo-1)\u003c\/li\u003e\n\u003cli\u003eLive-cell fluorescence microscopy\u003c\/li\u003e\n\u003cli\u003eRatiometric fluorescence measurements\u003c\/li\u003e\n\u003cli\u003eCell biology and signal transduction research\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2 style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e📊 Key Specifications\u003c\/h2\u003e\n\u003ctable style=\"font-family: 'Segoe UI Emoji', sans-serif; border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\"\u003e\u003cb\u003eSpecification\u003c\/b\u003e\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\"\u003e\u003cb\u003eDetails\u003c\/b\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCatalog Number\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eN2709300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eMagnification\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e40×\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e~1.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eWorking Distance\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e~0.25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eUAPO N 340 (Universal Apochromat, 340nm UV transmission)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eOptical Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eApochromat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eUV Transmission\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e340nm (optimized for Fura-2 calcium imaging)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eImmersion Medium\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eWater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCorrection\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eInfinity-corrected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eThread Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eRMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eOlympus BX, CX, IX series microscopes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eApplication\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eFura-2 calcium imaging, UV fluorescence, ratiometric imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003cp class=\"MsoNormal\" style=\"font-family: 'Segoe UI Emoji', sans-serif;\"\u003e\u003cb\u003eUniversity purchase orders accepted.\u003c\/b\u003e Contact us for volume pricing and institutional procurement options.\u003c\/p\u003e","brand":"spachoptics","offers":[{"title":"Default Title","offer_id":51695553478957,"sku":"N2709300","price":4900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/7965\/8029\/files\/OLYMPUS-UAPON40XW340--2.gif?v=1765527706","url":"https:\/\/www.spachoptics.com\/products\/olympus-uapo-n-340-40x-water-immersion-objective","provider":"Spach Optics, Inc.","version":"1.0","type":"link"}