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AmScope T490B Compound Tr... has been added to your Cart

AmScope T490B Compound Trinocular Microscope, 40X-2000X Magnification, Halogen Light, Abbe Condenser, 2-Layer Mechanical Stage, High-Resolution Optics, Awarded No. 6 Among The Top 10 Microscopes 2016

4.4 out of 5 stars 164 ratings

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  • 40X-2000X eight widefield magnification settings
  • Simul-focal trinocular head boasting unique features
  • 23mm photo port for adding photo/video capability
  • C-mount adapter included
  • 3D two-layer mechanical stage with low position control

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  • AmScope T490B Compound Trinocular Microscope, 40X-2000X Magnification, Halogen Light, Abbe Condenser, 2-Layer Mechanical Stag
  • +
  • AmScope BS-72P-100S-22 72 Pieces of Pre-Cleaned Blank Microscope Slides and 100 Pieces of 22x22mm Square Coverslips Cover Gla
  • +
  • AmScope PS25 Prepared Microscope Slide Set for Basic Biological Science Education, 25 Slides, Includes Fitted Wooden Case Bro
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Product description

AmScope T490B 40X-2000X Professional Trinocular Lab Education Biological Compound Microscope with 3D Two-Layer Mechanical Stage

From Manufacture:

AmScopeT490B features a unique simul-focal optical system with an adjustable trinocular port to enable well-focused clear images on your computer or video screen while simultaneously obtaining sharp, focused images through the eyepieces. In addition, the T490B's industry standard 23mm photo port can be converted into a C-Mount port by attaching the included C-mount adapter, allowing you to attach most microscope digital cameras and video systems on the market. The T490B includes a 30-degree inclined 360-degree swiveling trinocular Siedentopf head, a 3-D mechanical stage, and an intensity-variable halogen illumination system. This versatile microscope is also capable of being upgraded with various accessories and attachments listed in the optional section for additional functions. It is a perfect laboratory instrument for clinics, Vets, Doctors, and professional students. It arrives brand new in a factory sealed box.

Simul-focal Optical System

Most trinocular microscopes allow you to view either through the trinocular port or the eyepieces only, forcing you to switch between the two. Since these trinocular ports are not simul-focal with the rest of the microscope optical system, you have to re-focus the microscope after each switch. The T490B, however, erases this step by providing simul-focal viewing. Especially handy for teaching demonstrations, clinical examinations and laboratory applications, the simul-focal feature allows your students or colleagues to view clear images simultaneously while you work through the eyepieces.

What's In The Box?

Trinocular Simul-focal Microscope, Siedentopf Head, 23mm Adjustable, Trinocular Photo Port with C-Mount Adapter, Microscope Body with Frame, Base and Halogen Illumination System, DIN Objectives, 4X, 10X, 40X and 100X, Widefield 10X Eyepieces (Pair), Widefield 20X Eyepieces (Pair), Color Filters, 6V/20W Spare Halogen Bulb, Spare Fuse, Power Cord, Dust Cover, Immersion Oil, Customer Information Sheet (download link included).

About Microscopes

Microscopes are instruments used to enhance the resolution of an object or image. Types include compound, stereo, or digital. Compound microscopes use a compound optical system with an objective lens and an eyepiece. Stereo microscopes show object depth in a three-dimensional image. Digital microscopes are used to display an image on a monitor, rather than looking through a lens. Microscopes can have monocular (one), binocular (two), or trinocular (three) eyepieces, with varying magnification abilities. Magnification ability refers to the size of an image. Resolution, also known as resolvant power, refers to the clarity of the image. The interaction between field of view (FOV), numerical aperture (NA), and working distance (WD) determines resolution. Microscopes can control magnification through a fixed focus, or through a range of adjustments. They can also utilize LED, fluorescent, and mirror light sources to help control viewing capabilities. Microscopes are widely used in education, lab research, biology, metallurgy, engineering, chemistry, manufacturing, and in the medical, forensic science, and veterinary industries. AmScope has been manufacturing microscopy equipment and accessories since 1996, headquartering in Irvine, CA.

Features & Specifications
  • Simul-focal optical system allows simultaneous viewing through the photo port and eyepieces
  • Adjustable simul-focal trinocular port
  • Industry standard 23mm photo port and c-mount port
  • 30-degree inclined, 360-degree swiveling trinocular Siedentopf head
  • Photo/video capability with adjustable 23mm photo mount for simul-focal image system
  • Large 3D double layer mechanical stage with stain resistant finish
  • Low-position coaxial stage movement control knobs
  • Coaxial coarse & fine focusing with ca knob tension control
  • Fully coated optical system with high resolution
  • Eight magnification settings: 40x-80x-100x-200x-400x-800x-1000x-2000x
  • Upward stage stopper to protect slides and objectives
  • Abbe condenser with iris diaphragm & filters
  • Rack and pinion adjustment for condenser
  • Built-in halogen illumination system with variable intensity
  • Dual focusing control knobs
  • Full optical glass elements
  • Precise ground glass lenses
  • All metal mechanical components.
  • Adjustable interpupillary distance
  • Adjustable diopter on ocular
  • Solid metal frame construction with stain resistant enamel finish
  • CE and GS certified electrical system
  • Nosepiece: quadruple
  • Mechanical tube length: 6-5/16 inch (160mm)
  • Head: 360-degree swiveling trinocular Siedentopf head inclined at 30-degree
  • Eyepieces: wf10x and 20x
  • Achromatic objectives: 4x, 10x, 40x (spring), 100x (spring, oil)
  • Stage dimensions: 5-1/2 inch x 5-1/2 (140x140mm)
  • Stage traveling range: 2-15/16 inch x 1-3/4 inch (75x45mm)
  • Focusing range: 1-3/16 inch (30mm)
  • Division of fine focusing: 0.0000787 inch (0.002mm)
  • Abbe condenser: na=1.25 with rack and pinion focusing control
  • Illumination: 6v/20w halogen bulb
  • Power supply: 110v (220v version available), CE & GS certified
  • Accessories: 6v/20w spare halogen bulb, bottle of immersion oil, blue, green & yellow filters
  • Microscope dimensions: 12 inch x 9 inch x 16 inch
  • Manufactured under ISO 9001 quality control standard
  • Excellent five (5) year factory warranty
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4.4 out of 5 stars
4.4 out of 5
164 global ratings
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Top reviews from the United States

Reviewed in the United States on May 24, 2016
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Reviewed in the United States on August 4, 2015
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4.0 out of 5 stars Surprisingly good for the price. Could use some more/better camera options.
By E. Jensen on August 4, 2015
Excellent microscope for the price. The focus is precise and halogen lighting is perfect. I wish I had more options as far as attaching a camera, c-mount feels pretty dated, though at least it isn't some canon- or nikon-accepting only deal. I also wish the optional camera wasn't so expensive. A 2 megapixel, 2000's webcam-quality imaging unit shouldn't cost over $50, with lenses and adapter, but I'm not taking points off for that; The Microscope itself is an excellent value. The halogen light does tend to get very hot, both for your specimen and in general. Take care when working around it. Nothing gets dangerously hot, but your slide will dry out quickly.
If you're buying this as a non-professional, curious person I would recommend a stain kit with a variety of stains, microtome, pipettes, extra slides (both with depression and flat), slightly more slide covers than slides, pre-moistened alcohol pads, and lint-free wipes (I like KimTech).
Attached to the review are some sample shots I took with my phone through the eyepiece, I hope they help because it was an frustrating ordeal to get them. Again, the camera mount and available imaging unit could use some more love, price-wise.
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Reviewed in the United States on May 26, 2018
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5.0 out of 5 stars Great Photos With This Trinocular
By Carey on May 26, 2018
Great scope! I also bought the Omax 9mp camera to use with it (through my Mac laptop and supplied Troup Lite app) and I'm getting some terrific photos. It's a waste of money buying a higher res camera for this work. Originally I was going to buy a special photo eyepiece for my Canon SLR, but I'm glad I went the way I did. Anyway...I'm going to put an LED lamp in place of the halogen (which gets hot, and will dry your wet samples). I've been using two gooseneck LED lights to include top lighting (like with a dissecting microscope)...getting really nice photos with three-dimensionality this way. Great scope for the money, and works as well as my old Olympus (which cost 6k at the time). I particularly enjoy the the Siedentoph head, much easier to get real binocular image with this than with the Omax scope I had to return (because of this issue). It's nice that quality scopes are so affordable these days. p.s....I'm going to get a 60x objective to use in place of the supplied 100x oil immersion objective. Sharing my photo of Black Oak pollen, apx diameter is 0.04mm (used sub-stage halogen and two top LED sources (one on each side) can vary illum output of each to enhance 3D effect). My three-way cheapo gooseneck LED lights are better than the single brightness unit I never use now. Hope this helps.
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Reviewed in the United States on September 12, 2017
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gian valp
4.0 out of 5 stars Nel complesso buon prodotto, peccato per qualche piccolo difetto meccanico.........
Reviewed in Italy on August 25, 2018
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4.0 out of 5 stars Nel complesso buon prodotto, peccato per qualche piccolo difetto meccanico.........
Reviewed in Italy on August 25, 2018
Il primo microscopio ricevuto presentava un problema di assemblaggio. Purtroppo lo stativo (il braccio verticale del microscopio) è stato assemblato alla sua base con una piccola rotazione con il risultato che tutta la struttura superiore del microscopio non si presentava perfettamente allineata con la base e con il relativo sistema di illuminazione come si può vedere agevolmente dalla prima fotografia allegata.
Ho quindi avviato la procedura di reso e mi sono fatto sostituire il microscopio con un altro esemplare dello stesso modello perchè l’impressione complessiva che ne avevo ricavato era comunque positiva (fatto salvo il problema riscontrato).
Anche il secondo microscopio ricevuto presentava un piccolissimo disallineamento tra lampada e condensatore, ma non tale da pregiudicarne l’utilizzo. Ho scoperto poi che lo stativo è collegato alla base per mezzo di 4 brugole a cui si accede togliendo le 4 viti che fermano la copertura inferiore della base per cui volendo credo sia possibile intervenire recuperando l’allineamento preferito anche se non ho operato effettivamente in tal senso.
Si tratta di un microscopio del costo di qualche centinaio di euro ed è quindi impossibile confrontarlo con strumenti professionali del costo di molte migliaia o di decine di migliaia di euro.
E’ come per le auto, ci sono le utilitarie e le fuoriserie.
Questo microscopio è dotato di serie di obiettivi acromatici (i più economici) che correggono le aberrazioni cromatiche su due lunghezze d’onda soltanto, mentre i molto più costosi apocromatici le correggono su buona parte o tutte le lunghezze d’onda. Esistono anche obiettivi speciali (es. apocromatici alla fluorite sintetica o vetri ottici di composizione particolare), che rappresentano il top di gamma ma il cui costo può essere addirittura di molte migliaia di euro per un singolo obiettivo.
Esistono poi obiettivi che correggono oltre alla aberrazione cromatica, la distorsione sferica alla periferia dell’immagine inquadrata, che percepiamo come sfocatura, e sono per l’appunto gli obiettivi planari.
Ebbene, a mio parere, per un uso hobbistico (anche evoluto) penso che ci si possa limitare tranquillamente ad obiettivi acromatici semplici senza grossi problemi. Certo se poi siamo appassionati di fotografia e si vogliono ottenere immagini fotografiche di migliore qualità (penso ad esempio ai preparati istologici), possiamo anche prendere in esame gli obiettivi plano-acromatici.
Questi obiettivi acromatici comunque garantiscono una planarità di circa il 60% dell’area centrale inquadrata, contro un 80% di un semiplanare e un 95% di un obiettivo planare acromatico.
L’unico problema rilevato con le ottiche è stato con l’obiettivo 4x che aveva residui di sporco su di una lente e che ho dovuto pulire.
Con questo microscopio che usa lo standard DIN-RMS (160) è possibile con una spesa contenuta (circa 120 euro), sostituire agevolmente tutti gli obiettivi acromatici con dei plano-acromatici. Certo bisogna sapere cosa e dove comprare e lo si deve fare a parte, se si compra un microscopio plano acromatico già assemblato si spende decisamente di più.
L’illuminazione poteva essere migliore in quanto è di tipo alogeno da 20 Watt che ai grandi ingrandimenti, su di un trinoculare, si rivela un po’ scarsa.
Anche in questo caso volendo è possibile con una spesa molto contenuta bypassare o sostituire l’illuminazione standard fornita, con una lampada led cob con attacco G4 da 3-6 Watt collegata ad un alimentatore esterno con dimmer ad un costo di 10 Euro al massimo. Certo se si vuole avere un buon risultato estetico bisogna eliminare il trasformatore interno e fare qualche piccolo lavoretto da elettricista.
Con meno di 500 Euro avremmo quindi un microscopio con obiettivi plano acromatici e illuminazione a led. E con un centinaio di euro in più potremmo anche dotarlo di fotocamera per scattare fotografie e filmati da PC (in quest’ultimo caso la camera dovrà essere USB 3.0 altrimenti non reggerà il frame rate).
Volendo fare il pignolo, oltre all’illuminazione, ho notato alcuni difetti sul lato meccanico.
In particolare la rotellina che controlla l’altezza del condensatore, ha un gioco meccanico assai accentuato che contrasta con l’apparente solidità di tutti gli altri elementi di controllo del microscopio.
Un secondo problema riguarda la precisione meccanica del diaframma del condensatore. Non mi pare precisissimo in quanto osservando lo stesso diaframma da uno dei due tubi degli oculari (senza oculare) l’iride non si chiude simmetricamente dalla periferia verso il centro, in altre parole sembra che il foro centrale dell’iride non sia perfettamente centrato rispetto all’asse ottico del microscopio.
Il microscopio in questione a mio parere non è un giocattolo; ha tutto quello che occorre per farne un utilizzo anche più che hobbistico. E’ anche molto facile dotarlo di un sistema di visione darkfield, laterale o Rheinberg, costruendo dei filtri artigianali dal costo irrisorio, che modificano il sistema di illuminazione facendo risaltare i soggetti che si vogliono osservare in combinazioni cromatiche che migliorano il contrasto e la nitidezza delle immagini.
Il mio giudizio complessivo è che questo microscopio, a meno che non lo si debba utilizzare in attività o in un laboratorio di alta specializzazione, vada più che bene per uso hobbistico ed hobbistico evoluto e con un po’ di investimento aggiuntivo anche per un uso semi-professionale o anche professionale.
Valutazione complessiva 4 stelle su 5 per l’illuminazione alogena invece che a led e per qualche aspetto migliorabile sul lato meccanico.

Aggiornamento: ho provveduto alla sostituzione del sistema di illuminazione alogena originale da 20 watt, con una illuminazione a led COB da 6 watt dimmerata (Amscope per questo modello in versione led, usa una lampadina da 3 watt pari a 30 watt alogena). Ebbene la luminosità ora è fantastica, paragonabile a quella di una lampada alogena da 60 watt, utile soprattutto in applicazioni con filtri polarizzatori per attivare la visione in 3D. Costo dell'operazione meno di 7 Euro.
Ho poi provveduto ad allineare in maniera precisa lo stativo con la sua base.
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53 people found this helpful
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Ivan H
5.0 out of 5 stars Absolutely Brilliant
Reviewed in the United Kingdom on July 28, 2016
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7 people found this helpful
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5.0 out of 5 stars Great quality and very smooth focusing and panning
Reviewed in the United Kingdom on May 24, 2017
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6 people found this helpful
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Amazon Customer
4.0 out of 5 stars Four Stars
Reviewed in the United Kingdom on April 20, 2017
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4 people found this helpful
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Client d'Amazon
3.0 out of 5 stars Très beau microscope
Reviewed in France on September 26, 2019
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3.0 out of 5 stars Très beau microscope
Reviewed in France on September 26, 2019
J'ai du nettoyer toutes les lentilles, le miroir interne et cela a plusieurs reprises. Maintenant, tout est propre. Dans l'ensemble le microscope est fabuleux. Il est très lourd et stable. Il est facile pour monter. L'avantage est qu'il est selon les normes standard. On peut mettre d'autres lentilles 23mm, des oculaires ou installer n'importe quelle caméra avec la monture C. La prise était une prise USA, ce n'était pas indiqué dans les détails sur Amazon mais le microscope est fourni avec l'adaptateur de prise, donc aucun soucis. Cependant, 3 étoiles car très déçu de l'état des lentilles à l'arrivée. Avec les risques de rayures pour tout nettoyer, démonter et remonter a plusieurs reprise jusqu'à ce que tout soit propre. Surtout le miroir interne qui ne peut être remplacé car collé au support cela aurait été bête de me retrouver avec une rayure. Pas normal ou un tel appareil de précision neuf.
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