Size:working distance :(500 - 600 mm)XL  |  Color:Magnification:3.5x customer can also email us to get more information which will help customer to choose the right model loupes. If you are a beginner to use loupes, we recommend you to choose magnification 2.5X, because lower magnification loupes have bigger field of view, so loupes focus easy. The pupillary distance can be adjusted by one center axis,it is very simple and convenient for user. 4 kinds of working distance : S(280 - 380 mm), R(360 - 460 mm), L(440 - 540 mm), XL(500 - 600 mm).Please choose your working distance when you place order. If customer wear eyeglasses, we suggest you to choose our titanium frame loupes which can be mounted Prescription lens (RX lens ). Loupes Material: optical lens.4 kinds of working distance : S(280 - 380 mm), R(360 - 460 mm), L(440 - 540 mm), XL(500 - 600 mm).How To Choose Your Loupes Determine your working distance, which will also automatically determine your field of view. While working on a friend or family member have someone measure the distance from your eyes to your friend's mouth or body: this is you working distance. Choose the distance that is closest to the selection we offer.If you are sitting while working, your height is from 160cm to180cm, we recommend working distance R (360-460mm ). IF you are standing while working, your height is from 170cm to 180cm, we recommend L (440-540mm) working distance, even XL(500-600mm) working distance will be suitable.Please choose your working distance.
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