Question 1

I'm afraid mine isn't working at all. I can see the white circle but I can't see it magnify anything at all. Is mine broken or am I missing something?

Accepted Answer

It's probably working fine but you have to realize two things, it's designed for close work so if you have it too far away from whatever you're trying to view you're going to get the out of focus white circle. The second is if you have it close to or on top of whatever you were trying to look at you need to focus with the ring on the bottom. I thought mine was broken for a while until I figured out how to get it to focus. Finally you can also shift the focus when adjusting the magnification ring on top. If you change the magnification you will also need to refocus. Hope this helps

Question 2

How does this compare to the mm300? plain simple english please, i am not a scientist. i am using to inspect knife edges. thank you!!

Accepted Answer

I have Purchased 3 Carson microscopes 
20-40x - light button must be held down to turn on - purchased for my grandson
40-60x - light has on off switch
60-120x - light has on off switch
first I purchase the 60-120x to exam varroa mites in my bee hives. The magnification is so strong on 60x, the mites filled the viewer
Both smaller units work great for looking a mites.
60-120x seems to work great to see scratches in the metal blade of a knife

Question 3

will this work good with plant trichomes? for example the cannabis plant

Accepted Answer

Good question, i use it for the same reason. As for its function its a really small scope, so steady hands and good eyes(and patients) are required. It takes a little time to focus it but it does allow you to see when your trichs are ready. For the price its worth it but if you can afford a bigger better quality one i would go with that. The built in light works well though. The over all size of is a little bigger than a large thumb (if that helps at all).

Question 4

Can I use it for histology slides?

Accepted Answer

Yes, this product would be able to clearly represent histology slides. At the same time it will be a bit harder to use than a fixed microscope, One made for or around the concept of such scientific practices.

ASIN	B015MS7A3O
Additional Features	Lightweight
Age Range Description	Kid
Best Sellers Rank	#661 in Camera & Photo Products ( See Top 100 in Camera & Photo Products ) #100 in Lab Handheld Digital Microscopes
Brand Name	Carson
Closure Type	Clip
Color	Grey
Customer Reviews	4.0 4.0 out of 5 stars (721)
Global Trade Identification Number	00750668012890
Import Designation	Imported
Included Components	MicroMini Microscope, Smartphone Digiscoping Adapter Clip
Item Dimensions	1 x 2.7 x 3.2 inches
Item Type Name	Carson MicroMini 20x LED Lighted Pocket Microscope with Built-In LED and UV Flashlight and Universal Smartphone Digiscoping Adapter Clip (MM-380)
Item Weight	1.44 ounces
Manufacturer	Carson Optical, Inc
Manufacturer Part Number	MM-380
Manufacturer Warranty Description	Limited Lifetime
Material Type	Acrylic
Number of Items	1
Number of Packs	1
Number of Pieces	1
Product Style	Micromini + Smartphone Clip
Size	MicroMini (MM-380)
Style Number	MM-380
UPC	750668012890

Carson MicroMini 20x LED and UV Lit Pocket Microscope & Smartphone Clip

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