A hand lens or loupe is a useful addition to any field kit and will help in observing and identifying a wide range of specimens. These double lenses from Hilkinson provide two hand lenses in one, allowing you to observe your subject using two different magnifications. When not in use the lenses can be folded away into the compact and robust metal casing, keeping them protected from scratches and knocks.
The Hilkinson Ruper Double Lens is available with 18mm and 6mm lens diameters with 10x and 20x magnification respectively, or with 25mm and 12mm lens diameters which have 8x and 15x magnification.
For more information about choosing and using a hand lens, check out the NHBS Guide to Hand Lenses on our blog.