{"product_id":"40x-infinity-achromatic-microscope-objective-0-65-na-black","title":"40X Infinity Achromatic Microscope Objective - 0.65 NA Black","description":"\u003cp\u003eOur review of this 40X infinity achromatic objective finds it well suited to biology labs and serious hobbyists who need a compact, precision replacement lens for infinity-corrected microscopes. The single biggest reason to buy is its combination of a true \u003cstrong\u003e40X magnification\u003c\/strong\u003e with an achromatic correction and a 0.65 numerical aperture, which together improve color fidelity and resolving power for routine biological work. It installs on standard RMS threads and uses a spring nosecone for safe, parfocal mounting, making it a straightforward upgrade for compatible microscopes.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAchromatic correction:\u003c\/strong\u003e reduces color fringing across visible wavelengths so stained biological slides and cellular detail appear more accurate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfinity-corrected DIN design:\u003c\/strong\u003e fits microscopes with infinity optical systems and preserves the intended tube lens correction for sharp images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40X magnification with NA 0.65:\u003c\/strong\u003e balances reach and resolution for most mid-power biological observations, offering clearer detail than lower-power objectives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRMS mounting thread:\u003c\/strong\u003e standard 20.32mm thread and 45mm parfocal distance allow direct compatibility with many lab and teaching microscopes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring nosecone:\u003c\/strong\u003e protects slides by retracting on contact and helps maintain parfocal alignment when swapping objectives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack finish:\u003c\/strong\u003e durable coating gives a professional look and resists visible wear in routine use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis objective is aimed at educators, students, and hobby microscopists using infinity-corrected microscopes who need a reliable mid-power objective for biological samples such as prepared slides, tissue sections, and pond organisms. Laboratories that follow DIN standards will find it straightforward to fit into existing objective sets without extensive recalibration.\u003c\/p\u003e\n\n\u003cp\u003eUsers who require high-end plan or apochromatic correction for demanding photomicrography or critical color matching should look elsewhere, as this lens is a well-corrected achromat rather than an apochromat. Also, it is intended for optical systems with an infinity reference; it is not suitable for finite tube-length microscopes.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood color accuracy for an achromatic design, improving contrast and detail visibility on biological specimens.\u003c\/li\u003e\n\u003cli\u003eStandard RMS 20.32mm thread and 45mm parfocal distance make installation simple on compatible microscopes.\u003c\/li\u003e\n\u003cli\u003eThe 0.65 NA provides a solid balance of resolution and depth of field for mid-power observation.\u003c\/li\u003e\n\u003cli\u003eSpring nosecone protects slides and helps avoid accidental damage during objective changes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAchromatic correction is not as advanced as apochromatic optics, so the most demanding imaging tasks may show residual chromatic aberration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification\u003c\/td\u003e\n\u003ctd\u003e40X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumerical Aperture\u003c\/td\u003e\n\u003ctd\u003e0.65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrections\u003c\/td\u003e\n\u003ctd\u003eAchromatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical System\u003c\/td\u003e\n\u003ctd\u003eInfinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReference Focal Length\u003c\/td\u003e\n\u003ctd\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Thread\u003c\/td\u003e\n\u003ctd\u003eRMS 20.32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParfocal Distance\u003c\/td\u003e\n\u003ctd\u003e45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe objective is a practical, well-made 40X achromatic lens that delivers good color correction and resolving power for biological applications at a reasonable value. Buyers with infinity-corrected microscopes and RMS mounts will appreciate the easy fit and reliable performance, while those needing the ultimate in color correction for imaging should consider higher-grade apochromatic objectives instead.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this work on my microscope with RMS mounts?\u003c\/strong\u003e\u003cbr\u003eYes, it uses the standard RMS 20.32mm thread and a 45mm parfocal distance for compatibility with many microscopes that accept RMS objectives.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this objective suitable for oil immersion?\u003c\/strong\u003e\u003cbr\u003eNo, this lens is described with a spring nosecone and achromatic correction for dry biological use; it is not specified as an immersion objective.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it for photomicrography?\u003c\/strong\u003e\u003cbr\u003eIt can be used for general photomicrography on infinity-corrected systems, but apochromatic objectives give superior color fidelity for demanding imaging work.\u003c\/p\u003e","brand":"AmScope","offers":[{"title":"Default Title","offer_id":48258806218971,"sku":"B0197JP8VA","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71aA8s8NzML._AC_SL1500.jpg?v=1778239161","url":"https:\/\/gearmusthave.com\/products\/40x-infinity-achromatic-microscope-objective-0-65-na-black","provider":"GearMustHave","version":"1.0","type":"link"}