PEAK Lupe Optical Magnifier 15xThis is one of the best moderately priced magnifiers for looking a fountain pen nibs and the model we use for checking very fine fountain pen nibs. (We use the 10x model for most 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