3.5x Flip Up Waterproof Loupe on Ray-Ban Justin Frame Working Distance:Long 19.7" The headband has adjustments to

The headband has adjustments to customize the fit for you

0x Magnification Loupe will be mounted on a NIKE Radiation Frame

with a head strap

Step 3: Decide on your Working Distance

3.5x Flip Up Waterproof Loupe on Ray-Ban Justin Frame Working Distance:Long 19.7" The headband has adjustments toDescription Our 3. 5 Magnification loupe will be mounted on a Ray Ban Justin frame. This loupe offers a 2. 5" Field of View and 3 4" Depth of Field. Frame size is 50mm. Find your loupe: Step 1: Choose your Magnification Step 2: Choose your Frame Step 3: Decide on your Working Distance Click here to find your working distance Prescription We can add your prescription or reader, if you have one, into the lenses of the Justin frame at an additional $200