(Focus(mm) Resolution(mm) DF(mm) Object field of view(mm) Image field of view（mm)）. 100X 0.8 3.2 1.8 0.41 0.6 0.25 22.5. We will send you a new one after receiving the defective item. If item is defective after 3 months, you can still send it back to us.
eBay