AmScope T490B-DK Trinoculaire samengestelde donkerveldmicroscoop, 40X-2000X, 30,5 x 25,6 cm, wit

Perfecto

I really like this microscope. My only confusion is the high power oil immersion lens. For some reason my high power objective does not indicate that it is an oil immersion lens but after reaching out to the seller I am assured that it is. Although I have not been able to see anything online indicating oil immersion lenses will ever not have an oil indicator embossed on them. I still have yet to try it out though because I haven't had anything I needed that high of magnification. Hoping for the best when I do!

The only difference between men and boys is the price of their toys.In terms of bang for the buck, this may be the best techie man toy ever.PROSImpressive presentation. It's huge, at 14-1/2 inches tall without a camera and almost 20 inches tall with a compact digital camera on the trinocular port. It would be a little taller with an SLR/DSLR camera.Well constructed with a really solid feel to the whole thing. Knobs that move, such as the focusing knobs, the condenser positioning knob, and the stage positioning knobs, all move smoothly.The optics are quite good. Achromatic (and not planar), obviously, at this price point. But certainly good enough for students and hobbyists like me.This is no toy in the cheap sense of the word. This is a serious instrument.Overall, a great value at the $380 I paid this T490B-DK kit. (Which is the T490B microscope bundled with its optional DK-DRY100 darkfield condenser). I recommend you save yourself $90 by buying the T490B without the darkfield condenser. You can add the condenser at any time.EDUCATIONIdeal for homeschooling.As an 8-10 year old child circa 1950, I was given a cheap chemistry set and a toy microscope. I was never able to do anything with the chemistry set and the microscope was a useless piece of junk. Great idea. Encourage your kids to develop an interest in science by giving them scientific toys that do nothing but frustrate them.If you're lucky enough to have a child who's interested in science, the smartest thing you can do for them would be to buy them this microscope and a few (2-4) boxes of prepared slides. The benefit is not just the "discovery adventure" from getting really good views of really small things. You put your child down in front of a device of this size and sophistication and the message to the child is clear: "I am taking both you and your educations seriously. Very seriously."And it will also entertain you and impress your friends.CONS (remarkably few, and they're nits)The user's guide is lame, to put it charitably. The good news: what little assembly is required is reasonably obvious after looking at the pictures and I had no real trouble cobbling it together. If you do have any questions, AmScope has really good phone and website chat support.The eyepieces have limited eye relief. So, if you wear glasses, you might have an issue. I'm extremely nearsighted, but I just take my glasses off and let the microscope's focusing optics compensate for my vision. If that isn't going to work for you, meaning you will have to wear your glasses, your eyes will be too far from the eyepieces to see the entire image at one time. I.e., you'll need to move your head around to scan the entire image. (The eye relief is the maximum distance your eye can be from the eyepiece and still see the entire image the device is forming.)ASSEMBLY SUGGESTIONThere is an opening in the top of the binocular head for the camera mount tube. This opening has a plug in it you remove to install the tube. But there is no plug for the tube itself. So, if you don't have a camera to go on the tube, don't install the tube at this time or you'll just have a path for dust to enter the binocular head.DARKFIELD MICROSCOPYDarkfield microscopy is really cool stuff. If this topic is new to you (as it was to me), now would be a good time to check out the Wikipedia article. Although I purchased the darkfield condenser with this microscope, I haven't had much experience with it yet. Darkfield is really intended for use with unstained specimens, and as I only have prepared slides all of my specimens have been stained. The darkfield views I'm getting are pretty dim, and my guess is that the stain is absorbing much of the light that would otherwise be scattered by the unstained specimens. I don't know how this will work out in the long run, but if I learn anything interesting I'll update this review.BOTTOM LINEGreat bang for the buck.Really cool man toy.Wonderful child educational tool.Highly Recommended !

les enfants ont eu un choc face à ces petits vers translucide et gigotants, trouvés dans un peu de terre récupéré d'une plante.

J'ai mis le maximum de point car pour le prix, vous avez un véritable microscope pro !Il est solide, pratiquement tout en métal.Il est livré avec l'option "darkfield" qui permet de voir les préparations sur fond noir.Je le recommande à 100% !