Loupe Information 3 diopter is 1.75X, approximately 12-14 inch working distance. 5 diopte r is 2.25X, approximately 8-10 inch working distance. 7 diopter is 2.75X, approximately 5-7 inch working distance. Flexible wire bracket fits any glasses. Lightweight with two pivot points for adjustment and easy flip-up.
Hard coating helps resist scratches.
Same flip-up convenience. Ideal for examination of small detail. Two AA batteries included. Headband Loupes Lightweight, comfortable headband, easily flips up and down. Does not obstruct view.