Lunar CraterFinder is free to use: live Moon map, crater names, and photo crater labeling are all included at no cost. CraterFinder Pro turns your Moon photos into real measurements:

• Image scale measured from your photo (arcseconds per pixel)
• Field-of-view and magnification tools, checked against your telescope and eyepiece
• Tonight's viewing-conditions (seeing) rating, compared with your scope's Dawes limit

After purchase you'll receive an unlock code by email; enter it in the app under "Enter unlock code". Works offline, no subscription. Android only.

Want a sharper Moon? Browse our telescopes or call our experts at 888-471-9991.