Review on BelOMO 10x Triplet Jewelers Loupe Magnifier 21mm (.85-inch): Optical Glass with Anti-Reflection Coating for Bright, Clear, and Color Correct View. Foldable Loupe for Gemstone, Jewelry, Coin, and Trichome Inspection by Kelly Caballes

As mentioned, this is a good loupe with a very flat field (no distortion at the edges like a basic loupe) at a very modest price. This is a great magnifying glass combined with a mobile phone to take photos through a magnifying glass. Most camera apps on cell phones also have a zoom option, so your cell phone can increase the loupe magnification. For example, select 2x magnification in the camera app with Belomo 10x magnification and you will get 2*10 = 20x magnification. This magnifier easily attaches to the back of a phone with pretty much anything - I used a couple of rubber bands. . Then open the Camera app and move the magnifying glass so it's centered on the camera lens. Take a picture of what you want to see with your phone. You can use a flashlight, mirror, etc. to get more light on the subject if needed. at least one weasel, one wild flower.