PEAK 1962 Loupe Optical Magnifier - Glass Lens - 15xThis is one of the best moderately priced magnifiers for looking a fountain pen nibs and the model we use for checking fountain pen nibs. Two optical quality glass lenses that give 15x mangification and sufficient field of view to obtain a very clear image of the nib and the tine alignment. The clear acrylic skirt allows light in and also shows you the focal plane of the magnifier so you know where to place the nib for the clearest view. When checking