Because we sell direct to consumer, we’re not limited to the type of materials we can use. As a result, we use the best glass available in our optics. In our B and S Series optics, we utilize the best optical components available from Japan. In our C Series we use a combination of key Japanese components along with other optical elements from China. In all of our optics we plan and build an overall optical system tuned to be the best performance available for the price.