Deluxe Box Magnifier, Ideal for Observing Large Insects, Base size: 3 1/2in L x 3 1/2in W x 2 3/4in H, Lens diameter: 2 1/4in, View specimens up close, then set them free. The base of the 3X magnifier covers live specimens for hands-free observation, Clear plastic
Highly corrected aplanatic 7X magnifier has three separate lenses, bonded together to form a compound lens. Provides sharp, very distinct images, with no color distortion. Swing-away nickel plated case. Focal Length: 38mm. Lens Diameter: 19.8mm. Work Distance: 33.6mm.
The Helpinghands Magnifier From Carson Is A Hand-Held Or Hands-Free, Fully Adjustable Led Lighted Soldering And Hobby Magnifier, It Contains A 2X Power Distortion-Free Acrylic Lens (4.3 In Lens Diameter).