Useful in case of strong light in outdoor or low light indoors; works very well on XZ1 whose screen (if acclaimed) reached its limits. As against the price is really excessive! For the one who wants to acquire the wonderful XZ1 it actually amounts to 60 euros Olympus - XZ-1 - E0412142 - Digital Camera - 10 Megapixel - Black + Viewfinder VF-3 Only the price is exaggerated from where the 3 stars.